List of Chromium Command Line Switches

The constant OS_WIN must be defined.

/prefetch:# arguments to use when launching various process types. It has been observed that when file reads are consistent for 3 process launches with the same /prefetch:# argument, the Windows prefetcher starts issuing reads in batch at process launch. Because reads depend on the process type, the prefetcher wouldn’t be able to observe consistent reads if no /prefetch:# arguments were used. Note that the browser process has no /prefetch:# argument; as such all other processes must have one in order to avoid polluting its profile. Note: # must always be in [1, 8]; otherwise it is ignored by the Windows prefetcher.

The constant OS_WIN must be defined.

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The constant OS_WIN must be defined.

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The constant OS_WIN must be defined.

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The constant OS_WIN must be defined.

/prefetch:# arguments for the browser process launched in background mode and for the watcher process. Use profiles 5, 6 and 7 as documented on kPrefetchArgument* in content_switches.cc.

The constant OS_WIN must be defined.

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The constant OS_WIN must be defined.

/prefetch:# argument shared by all process types that don’t have their own. It is likely that the prefetcher won’t work for these process types as it won’t be able to observe consistent file reads across launches. However, having a valid prefetch argument for these process types is required to prevent them from interfering with the prefetch profile of the browser process.

Value of the --profiler-timing flag that will disable timing information for chrome://profiler.

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Flag indicating that a resource provider must be set up to provide cast receiver with resources. Apps cannot start until provided resources. This flag implies --alsa-check-close-timeout=0.

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Enables a new tuning of the WebRTC Acoustic Echo Canceler (AEC). The new tuning aims at resolving two issues with the AEC: https://bugs.chromium.org/p/webrtc/issues/detail?id=5777 https://bugs.chromium.org/p/webrtc/issues/detail?id=5778 TODO(hlundin): Remove this switch when experimentation is over; crbug.com/603821.

Override the default minimum starting volume of the Automatic Gain Control algorithm in WebRTC used with audio tracks from getUserMedia. The valid range is 12-255. Values outside that range will be clamped to the lowest or highest valid value inside WebRTC. TODO(tommi): Remove this switch when crbug.com/555577 is fixed.

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Allows third-party content included on a page to prompt for a HTTP basic auth username/password pair.

If this flag is set, enable data roaming in the cellular network by default upon system start if it’s an unmanaged device. This flag is used by Rialto device to obtain device policy during OOBE since the Rialto device has no display and and only connects over cell.

Allow access to external pages during layout tests.

If this flag is passed, failed policy fetches will not cause profile initialization to fail. This is useful for tests because it means that tests don’t have to mock out the policy infrastructure.

By default, file:// URIs cannot read other file:// URIs. This is an override for developers who need the old behavior for testing.

Allows media playback for hidden WebContents

Allows non-https URL for background_page for hosted apps.

Allow non-secure origins to use the screen capture API and the desktopCapture extension API.

Enables TLS/SSL errors on localhost to be ignored (no interstitial, no blocking of requests).

Allows the browser to load extensions that lack a modern manifest when that would otherwise be forbidden.

Allows loopback interface to be added in network list for peer connection.

The constant BUILDFLAG(ENABLE_PLUGINS) must be defined.

Specifies comma-separated list of extension ids or hosts to grant access to CRX file system APIs.

The constant BUILDFLAG(ENABLE_PLUGINS) must be defined.

Specifies comma-separated list of extension ids or hosts to grant access to file handle APIs.

The constant BUILDFLAG(ENABLE_PLUGINS) must be defined.

Specifies comma-separated list of extension ids or hosts to grant access to TCP/UDP socket APIs.

Enables the sandboxed processes to run without a job object assigned to them. This flag is required to allow Chrome to run in RemoteApps or Citrix. This flag can reduce the security of the sandboxed processes and allow them to do certain API calls like shut down Windows or access the clipboard. Also we lose the chance to kill some processes until the outer job that owns them finishes.

Don’t block outdated plugins.

Allows remote attestation (RA) in dev mode for testing purpose. Usually RA is disabled in dev mode because it will always fail. However, there are cases in testing where we do want to go through the permission flow even in dev mode. This can be enabled by this flag.

By default, an https page cannot run JavaScript, CSS or plugins from http URLs. This provides an override to get the old insecure behavior.

Allows debugging of sandboxed processes (see zygote_main_linux.cc).

Allows Web Push notifications that do not show a notification.

Time in ms to wait before closing the PCM handle when no more mixer inputs remain. Assumed to be 0 if --accept-resource-provider is present.

Flag that enables resampling audio with sample rate below 32kHz up to 48kHz. Should be set to true for internal audio products.

Optional flag to set a fixed sample rate for the alsa device.

The constants OS_FREEBSD, OS_LINUX and OS_SOLARIS must be defined.

The Alsa device to use when opening an audio input stream.

Minimum number of available frames for scheduling a transfer.

Size of the ALSA output buffer in frames. This directly sets the latency of the output device. Latency can be calculated by multiplying the sample rate by the output buffer size.

The constants OS_FREEBSD, OS_LINUX and OS_SOLARIS must be defined.

The Alsa device to use when opening an audio stream.

Size of the ALSA output period in frames. The period of an ALSA output device determines how many frames elapse between hardware interrupts.

How many frames need to be in the output buffer before output starts.

Also emit full event trace logs for successful tests.

Prevents Chrome from requiring authorization to run certain widely installed but less commonly used plugins.

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Always use the complex text path for layout tests.

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Uses the android SkFontManager on linux. The specified directory should include the configuration xml file with the name “fonts.xml”. This is used in blimp to emulate android fonts on linux.

The constant OS_ANDROID must be defined.

Redirect stderr to the given port. Only supported on Android.

The constant OS_ANDROID must be defined.

Redirect stdin to the given port. Only supported on Android.

The constant OS_ANDROID must be defined.

Redirect stdout to the given port. Only supported on Android.

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Specifies that the associated value should be launched in “application” mode.

Specifies whether an app launched in kiosk mode was auto launched with zero delay. Used in order to properly restore auto-launched state during session restore flow.

Specifies that the extension-app with the specified id should be launched according to its configuration.

Value of GAIA auth code for --force-app-mode.

Value of OAuth2 refresh token for --force-app-mode.

Path for app’s OEM manifest file.

Allow roaming in the cellular network.

Size for the host window to create (i.e. “800×600”).

SSID of the preferred WiFi network.

Refresh token for identity API calls for the current user. Used for testing.

User email address of the current user.

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The URL that the webstore APIs download extensions from. Note: the URL must contain one ‘%s’ for the extension ID.

The update url used by gallery/webstore extensions.

The URL to use for the gallery link in the app launcher.

The constant OS_MACOSX must be defined.

Prevents Chrome from quitting when Chrome Apps are open.

Signals ARC support status on this device. This can take one of the following three values. – none: ARC is not installed on this device. (default) – installed: ARC is installed on this device, but not officially supported. Users can enable ARC only when Finch experiment is turned on. – installed-only-kiosk-supported: ARC is installed, but officially supported only in kiosk mode. – officially-supported: ARC is installed and supported on this device. So users can enable ARC via settings etc. – officially-supported-with-active-directory: ARC is supported and also allowed to use with Active Directory management.

DEPRECATED: Please use --arc-availability=installed. Signals the availability of the ARC instance on this device.

Screenshot testing: specifies the directoru where artifacts will be stored.

Enables adjustable large cursor.

Enables an animated transition from the boot splash screen (Chrome logo on a white background) to the login screen. Implies |kAshCopyHostBackgroundAtBoot| and doesn’t make much sense if used in conjunction with |kDisableBootAnimation| (since the transition begins at the same time as the white/grayscale login screen animation).

Copies the host window’s content to the system background layer at startup. Can make boot slightly slower, but also hides an even-longer awkward period where we display a white background if the login wallpaper takes a long time to load.

Enable keyboard shortcuts useful for debugging.

Enable keyboard shortcuts used by developers only.

Disables the window backdrops normally used in maximize mode (TouchView).

Disable the support for WebContents to lock the screen orientation.

Disable the Touch Exploration Mode. Touch Exploration Mode will no longer be turned on automatically when spoken feedback is enabled when this flag is set.

Enables docking windows to the right or left (not to be confused with snapped windows).

Enables key bindings to scroll magnified screen.

Enables mirrored screen.

Enables the palette on every display, instead of only the internal one.

Enables software based mirroring.

The constant OS_CHROMEOS must be defined.

Enables unified desktop mode.

Enables the palette next to the status area.

Hides notifications that are irrelevant to Chrome OS device factory testing, such as battery level updates.

Sets a window size, optional position, and optional scale factor. “1024×768” creates a window of size 1024×768. “100+200-1024×768” positions the window at 100,200. “1024×768*2” sets the scale factor to 2 for a high DPI display. “800,0+800-800×800” for two displays at 800×800 resolution. “800,0+800-800×800,0+1600-800×800” for three displays at 800×800 resolution.

Enables the shelf color to be derived from the wallpaper.

Enables the heads-up display for tracking touch points.

When wallpaper boot animation is not disabled this switch is used to override OOBE/sign in WebUI init type. Possible values: parallel|postpone. Default: parallel.

Determines which Google Privacy CA to use for attestation.

Allow users to specify a custom buffer size for debugging purpose.

(Most) Chrome OS hardware reports ACPI power button releases correctly. Standard hardware reports releases immediately after presses. If set, we lock the screen or shutdown the system immediately in response to a press instead of displaying an interactive animation.

Enables overriding the path for the default authentication extension.

Whitelist for Negotiate Auth servers

The constant OS_ANDROID must be defined.

Android authentication account type for SPNEGO authentication

The values the kTouchEventFeatureDetection switch may have, as in --touch-events=disabled. auto: enabled at startup when an attached touchscreen is present.

This flag makes Chrome auto-open DevTools window for each tab. It is intended to be used by developers and automation to not require user interaction for opening DevTools.

This flag makes Chrome auto-select the provided choice when an extension asks permission to start desktop capture. Should only be used for tests. For instance, --auto-select-desktop-capture-source="Entire screen" will automatically select to share the entire screen in English locales.

Set blink settings. Format is <name>[=<value],<name>[=<value>],… The names are declared in Settings.json5. For boolean type, use “true”, “false”, or omit ‘=<value>’ part to set to true. For enum type, use the int value of the enum value. Applied after other command line flags and prefs.

Values for the kExtensionContentVerification flag. See ContentVerifierDelegate::Mode for more explanation.

Path to the exe to run for the renderer and plugin subprocesses.

Tells Content Shell that it’s running as a content_browsertest.

Indicates that the browser is in “browse without sign-in” (Guest session) mode. Should completely disable extensions, sync and bookmarks.

This flag causes the user engagement checks for showing app banners to be bypassed. It is intended to be used by developers who wish to test that their sites otherwise meet the criteria needed to show app banners.

The number of MSAA samples for canvas2D. Requires MSAA support by GPU to have an effect. 0 disables MSAA.

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Used to pass initial screen resolution to GPU process. This allows us to set screen size correctly (so no need to resize when first window is created).

Increases timeout for memory checkers.

Prevents the layer tree unit tests from timing out.

Makes pixel tests write their output instead of read it.

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How often (in seconds) to check for updates. Should only be used for testing purposes.

Check whether all system dependencies for running layout tests are met.

Enables CHECKs to ensure that tile priorities are not inverted.

Used internally by the main process to indicate that a new process should be a child process. Takes the absolute path to the service library to load as an argument. Not for user use.

Default large wallpaper to use for kids accounts (as path to trusted, non-user-writable JPEG file).

Default small wallpaper to use for kids accounts (as path to trusted, non-user-writable JPEG file).

The memory pressure thresholds selection which is used to decide whether and when a memory pressure event needs to get fired.

Comma-separated list of SSL cipher suites to disable.

The constants OS_CHROMEOS and OS_MACOSX must not be defined, and the constant OS_POSIX must be defined.

The same as the --class argument in X applications. Overrides the WM_CLASS window property with the given value.

Clears the token service before using it. This allows simulating the expiration of credentials during testing.

Tells chrome to display the cloud print dialog and upload the specified file for printing.

Specifies the mime type to be used when uploading data from the file referenced by cloud-print-file. Defaults to “application/pdf” if unspecified.

Used with kCloudPrintFile to specify a title for the resulting print job.

Used with kCloudPrintFile to specify a JSON print ticket for the resulting print job. Defaults to null if unspecified.

Setup cloud print proxy for provided printers. This does not start service or register proxy for autostart.

The URL of the cloud print service to use, overrides any value stored in preferences, and the default. Only used if the cloud print service has been enabled. Used for testing.

The XMPP endpoint the cloud print service will use. Only used if the cloud print service has been enabled. Used for testing.

Enable compensation for unstable pinch zoom. Some touch screens display significant amount of wobble when moving a finger in a straight line. This makes two finger scroll trigger an oscillating pinch zoom. See crbug.com/394380 for details.

Always return success when compiling a shader. Linking will still fail.

Comma-separated options to troubleshoot the component updater. Only valid for the browser process.

Url for network connectivity checking. Default is “https://clients3.google.com/generate_204“.

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Texture target for CHROMIUM_image backed content textures.

Size for the content_shell’s host window (i.e. “800×600”).

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The directory breakpad should store minidumps in.

When specified to “enable-leak-detection” command-line option, causes the leak detector to cause immediate crash when found leak.

Comma-separated list of BrowserThreads that cause browser process to crash if the given browser thread is not responsive. UI,IO,DB,FILE,CACHE are the list of BrowserThreads that are supported. For example: --crash-on-hang-threads=UI:3:18,IO:3:18 –> Crash the browser if UI or IO is not responsive for 18 seconds and the number of browser threads that are responding is less than or equal to 3.

Server url to upload crash data to. Default is “http://clients2.google.com/cr/report” for prod devices. Default is “http://clients2.google.com/cr/staging_report” for non prod.

Causes the browser process to crash on startup.

A process type (switches::kProcessType) that indicates chrome.exe or setup.exe is being launched as crashpad_handler. This is only used on Windows. We bundle the handler into chrome.exe on Windows because there is high probability of a “new” .exe being blocked or interfered with by application firewalls, AV software, etc. On other platforms, crashpad_handler is a standalone executable.

Some platforms like ChromeOS default to empty desktop. Browser tests may need to add this switch so that at least one browser instance is created on startup. TODO(nkostylev): Investigate if this switch could be removed. (http://crbug.com/148675)

Ask the GLX driver for the default context instead of trying to get the highest version possible.

Forces CrOS region value.

Control regions data load (“” is default).

The constant OS_CHROMEOS must be defined.

Custom crosh command.

Overrides the default URL for Google APIs (https://www.googleapis.com) used by CryptAuth.

Specify a custom path to devtools for devtools tests

Specifies the chrome-extension:// URL for the contents of an additional page added to the app launcher.

The constant OS_ANDROID must be defined.

Forces a custom summary to be displayed below the update menu item.

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Makes Content Shell use the given path for its data directory.

The URL from which to retrieve the Data Reduction Proxy configuration.

If set, enables use of QUIC with non core data reduction proxies.

The name of a Data Reduction Proxy experiment to run. These experiments are defined by the proxy server. Use --force-fieldtrials for Data Reduction Proxy field trials.

The semicolon-separated list of proxy server URIs to override the list of HTTP proxies returned by the Data Saver API. It is illegal to use |kDataReductionProxy| or |kDataReductionProxyFallback| switch in conjunction with |kDataReductionProxyHttpProxies|. If the URI omits a scheme, then the proxy server scheme defaults to HTTP, and if the port is omitted then the default port for that scheme is used. E.g. “http://foo.net:80“, “http://foo.net“, “foo.net:80”, and “foo.net” are all equivalent.

The mode for Data Reduction Proxy Lo-Fi. The various modes are always-on, cellular-only, slow connections only and disabled.

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Sets a secure proxy check URL to test before committing to using the Data Reduction Proxy. Note this check does not go through the Data Reduction Proxy.

Disables server experiments that may be enabled through field trial.

Sets a URL to fetch to warm up the data reduction proxy on startup and network changes.

Forces the stub implementation of dbus clients.

Run devtools tests in debug mode (not bundled and minified)

Enables a frame context menu item that toggles the frame in and out of glass mode (Windows Vista and up only).

Adds debugging entries such as Inspect Element to context menus of packed apps.

The constant OFFICIAL_BUILD must not be defined, and the constant BUILDFLAG(ENABLE_PRINT_PREVIEW) must be defined.

Enables support to debug printing subsystem.

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Sets the tile size used by composited layers.

Indicates that the wallpaper images specified by kAshDefaultWallpaper{Large,Small} are OEM-specific (i.e. they are not downloadable from Google).

Default large wallpaper to use (as path to trusted, non-user-writable JPEG file).

Default small wallpaper to use (as path to trusted, non-user-writable JPEG file).

Optional value for Data Saver prompt on cellular networks.

Time in seconds before a machine at OOBE is considered derelict.

Time in seconds before a derelict machines starts demo mode.

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When present, desktop cast_shell will create 1080p window (provided display resolution is high enough). Otherwise, cast_shell defaults to 720p.

Instructs headless_shell to cause network fetches to complete in order of creation. This removes a significant source of network related non-determinism at the cost of slower page loads.

Specifies the URL at which to fetch configuration policy from the device management backend.

The constant OS_WIN must be defined.

Device scale factor passed to certain processes like renderers, etc.

Passes command line parameters to the DevTools front-end.

Triggers a plethora of diagnostic modes.

Sets the output format for diagnostic modes enabled by diagnostics flag.

Tells the diagnostics mode to do the requested recovery step(s).

Values for the kShowSavedCopy flag.

Disable antialiasing on 2d canvas clips

Disables Canvas2D rendering into a scanout buffer for overlay support.

Disables client-visible 3D APIs, in particular WebGL and Pepper 3D. This is controlled by policy and is kept separate from the other enable/disable switches to avoid accidentally regressing the policy support for controlling access to these APIs.

Disable gpu-accelerated 2d canvas.

Disable partially decoding jpeg images using the GPU. At least YUV decoding will be accelerated when not using this flag. Has no effect unless GPU rasterization is enabled.

Disable hardware acceleration of mjpeg decode for captured frame, where available.

Disables hardware acceleration of video decode, where available.

Disables consistent identity features.

Disables the display of a banner allowing the user to add a web app to their shelf (or platform-specific equivalent)

The constant OS_MACOSX must be defined.

Disable the toolkit-views App Info dialog for Mac.

If set, the app list will not be dismissed when it loses focus. This is useful when testing the app list or a custom launcher page. It can still be dismissed via the other methods (like the Esc key).

The constant OS_MACOSX must be defined.

Disables custom Cmd+` window cycling for platform apps and hosted apps.

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Disables android user data wipe on opt out.

Disables ARC Opt-in verification process and ARC is enabled by default.

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The constant OS_ANDROID must be defined.

Disables showing suggestions in a keyboard accessory view.

The constant OS_IOS must not be defined, and the constant OS_MACOSX must be defined.

Disable use of AVFoundation to draw video content.

Disable several subsystems which run network requests in the background. This is for use when doing network performance testing to avoid noise in the measurements.

Disable task throttling of timer tasks from background pages.

Disable limits on the number of backing stores. Can prevent blinking for users with many windows/tabs and lots of memory.

Disable one or more Blink runtime-enabled features. Use names from RuntimeEnabledFeatures.json5, separated by commas. Applied after kEnableBlinkFeatures, and after other flags that change these features.

Disables wallpaper boot animation (except of OOBE case).

Disables the crash reporting.

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Disables the bundled PPAPI version of Flash.

Disable antialiasing on 2d canvas.

Disables bypass proxy for captive portal authorization.

Disable hardware encoding support for Cast Streaming.

Disables data volume counters in the Clear Browsing Data dialog.

Disables the client-side phishing detection feature. Note that even if client-side phishing detection is enabled, it will only be active if the user has opted in to UMA stats and SafeBrowsing is enabled in the preferences.

Disables cloud backup feature.

Disables fetching and storing cloud policy for components.

Disable default component extensions with background pages – useful for performance tests where these pages may interfere with perf results.

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Disables layer-edge anti-aliasing in the compositor.

Disables Contextual Search.

Disables use of D3D11.

Disables HTML5 DB support.

Disables Data Saver prompt on cellular networks.

Disables installation of default apps on first run. This is used during automated testing.

Disables the Chrome OS demo.

If this switch is set, the device cannot be remotely disabled by its owner.

Disables device discovery notifications.

Disables the dinosaur easter egg on the offline interstitial.

Disables the use of DirectComposition to draw to the screen.

The constant OS_WIN must be defined.

Disables DirectWrite font rendering for general UI elements.

The constant OS_CHROMEOS must be defined.

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Disables distance field text.

Disable the per-domain blocking for 3D APIs after GPU reset. This switch is intended only for tests.

Disables Domain Reliability Monitoring.

Disables the string change from “Save Image” to “Download Image”.

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Disables use of DWM composition for top level windows.

Disables notification when device is in end of life status.

Disable OpenGL ES 3 APIs. This in turn will disable WebGL2.

Disables use of ES3 backend (use ES2 backend instead).

Disable extensions.

Disable extensions except those specified in a comma-separated list.

Disable checking for user opt-in for extensions that want to inject script into file URLs (ie, always allow it). This is used during automated testing.

Disable the net::URLRequestThrottlerManager functionality for requests originating from extensions.

Disables a workaround for fast inset updates for UIWebView.scrollView.

Lists separated by commas the name of features to disable. See base::FeatureList::InitializeFromCommandLine for details.

Disable field trial tests configured in fieldtrial_testing_config.json.

Disable FileSystem API.

Disable 3D inside of flapper.

Disable Stage3D inside of flapper.

The constant OS_MACOSX must be defined.

Disables fullscreen low power mode on Mac.

The constant OS_MACOSX must be defined.

Disables tab detaching in fullscreen mode on Mac.

Disables GAIA services such as enrollment and OAuth session restore. Used by ‘fake’ telemetry login.

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Disable user gesture requirement for media playback.

Disable user gesture requirement for presentation.

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Disables GL drawing operations which produce pixel output. With this the GL output will not be correct but tests will run faster.

Disable the GL error log limit.

Disables specified comma separated GL Extensions if found.

Disable the GLSL translator.

Disables GPU hardware acceleration. If software renderer is not in place, then the GPU process won’t launch.

Disable async GL worker context. Overrides kEnableGpuAsyncWorkerContext.

Prevent the compositor from using its GPU implementation.

Disable workarounds for various GPU driver bugs.

Disable proactive early init of GPU process.

Do not force that all compositor resources be backed by GPU memory buffers.

Disable GpuMemoryBuffer backed VideoFrames.

Disable the limit on the number of times the GPU process may be restarted. For tests and platforms where software fallback is disabled.

Turn off gpu program caching

Disable GPU rasterization, i.e. rasterize on the CPU only. Overrides the kEnableGpuRasterization and kForceGpuRasterization flags.

Disable the GPU process sandbox.

Disables the GPU shader on disk cache.

Stop the GPU from synchronizing on the vsync before presenting. We can select from the options below: beginframe: Next frame can start without any delay on cc::scheduler in renderer compositors. gpu: Disable display and browser vsync. default: Set both flags.

Disable the thread that crashes the GPU process if it stops responding to messages.

Suppresses hang monitor dialogs in renderer processes. This may allow slow unload handlers on a page to prevent the tab from closing, but the Task Manager can be used to terminate the offending process in this case.

Disables HID-detection OOBE screen.

Disable hiding the close buttons of inactive tabs when the tabstrip is in stacked mode.

Disable the RenderThread’s HistogramCustomizer.

The constant OS_MACOSX must be defined.

Disables app shim creation for hosted apps on Mac.

The constant OS_MACOSX must be defined.

Prevents hosted apps from being opened in windows on Mac.

Disables the HTTP/2 protocol.

Disable in-process stack traces.

Prevent infobars from appearing.

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Disable password generation for iOS.

Disable showing available password credentials in the keyboard accessory view when focused on form fields.

Disables Physical Web scanning for nearby URLs.

Disable latest shipping ECMAScript 6 features.

Don’t kill a child process when it sends a bad IPC message. Apart from testing, it is a bad idea from a security perspective to enable this switch.

Disables LCD text.

The constant OS_WIN must be defined.

Disable the Legacy Window which corresponds to the size of the WebContents.

Disable LocalStorage.

Force logging to be disabled. Logging is enabled by default in debug builds.

Avoid doing expensive animations upon login.

Force disabling of low-end device mode when set.

Disables using CODECAPI_AVLowLatencyMode when creating DXVA decoders.

When using CPU rasterizing disable low resolution tiling. This uses less power, particularly during animations, but more white may be seen during fast scrolling especially on slower devices.

Disable the snapshots lru cache.

The constant OS_IOS must not be defined, and the constant OS_MACOSX must be defined.

Fall back to using CAOpenGLLayers display content, instead of the IOSurface based overlay display path.

The constant OS_MACOSX must be defined.

Disables use of toolkit-views based native app windows.

Disables sending the next BeginMainFrame before the previous commit activates. Overrides the kEnableMainFrameBeforeActivation flag.

Disables material design OOBE UI.

The constant OS_ANDROID must be defined.

Disable Media Session API

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The constant OS_WIN must be defined.

Disables merging the key event (WM_KEY*) with the char event (WM_CHAR).

Disable the behavior that the second click on a launcher item (the click when the item is already active) minimizes the item.

The constant BUILDFLAG(ENABLE_RUNTIME_MEDIA_RENDERER_SELECTION) must be defined.

Rather than use the renderer hosted remotely in the media service, fall back to the default renderer within content_renderer. Does not change the behavior of the media service.

Disables mtp write support.

Disables the multiple display layout UI.

Disables usage of the namespace sandbox.

Disables native GPU memory buffer support.

Disables notifications about captive portals in session.

Disables the new bookmark app system.

Disables new channel switcher UI.

Disables new Kiosk UI when kiosk apps are represented as user pods.

Disables the new Korean IME in chrome://settings/languages.

Disables new profile management system, including new profile chooser UI.

Disables the new File System Provider API based ZIP unpacker.

Disables the Web Notification and the Push APIs.

Disables showing popular sites on the NTP.

Disables the video decoder from drawing to an NV12 textures instead of ARGB.

Force hiding the local save checkbox in the autofill dialog box for getting the full credit card number for a wallet card. The card will never be stored locally.

Disables offering to upload credit cards.

Disables Office Editing for Docs, Sheets & Slides component app so handlers won’t be registered, making it possible to install another version for testing.

Disable auto-reload of error pages if offline.

Disable only auto-reloading error pages when the tab is visible.

No description

The constant OS_ANDROID must be defined.

Disable overscroll edge effects like those found in Android views.

The constant OS_CHROMEOS must be defined.

Disables panel fitting (used for mirror mode).

Disable partial raster in the renderer. Disabling this switch also disables the use of persistent gpu memory buffers.

Disables password generation when we detect that the user is going through account creation.

Disable the Payment Request API.

Disable Pepper3D.

Disable Image Chromium for Pepper 3d.

The constant OS_WIN must be defined.

Disables per monitor DPI for supported Windows versions. This flag overrides kEnablePerMonitorDpi.

Disables permission action reporting to Safe Browsing servers for opted in users.

Disables the Permissions API.

Disables suggestions while typing on a physical keyboard.

Disables compositor-accelerated touch-screen pinch gestures.

Disables crash throttling for Portable Native Client.

Disable pop-up blocking.

Disable the creation of compositing layers when it would prevent LCD text.

Disables the Presentation API.

Disables print preview (For testing, and for users who don’t like us. :[ )

Normally when the user attempts to navigate to a page that was the result of a post we prompt to make sure they want to. This switch may be used to disable that check. This switch is used during automated testing.

The constant OS_ANDROID must be defined.

Disable the pull-to-refresh effect when vertically overscrolling content.

Enable background mode for the Push API.

Disables the QUIC protocol.

Taints all <canvas> elements, regardless of origin.

The constant OS_IOS must not be defined, and the constant OS_MACOSX must be defined.

Disable use of cross-process CALayers to display content directly from the GPU process on Mac.

Disables remote web font support. SVG font should always work whether this option is specified or not.

Disables the RemotePlayback API.

Turns off the accessibility in the renderer.

Prevent renderer process backgrounding when set.

No not manage renderer process priority at all when set.

Whether the resize lock is disabled. Default is false. This is generally only useful for tests that want to force disabling.

Disables RGBA_4444 textures.

Disables rollback option on reset screen.

Disables the new rendering algorithm for webrtc, which is designed to improve the rendering smoothness.

The constant OS_ANDROID must be defined.

Disable the locking feature of the screen orientation API.

Disables showing the search geolocation disclosure UI. Used for perf testing.

Disable the seccomp filter sandbox (seccomp-bpf) (Linux only).

Disable settings in a separate browser window per profile (see SettingsWindowEnabled() below).

Disable the setuid sandbox (Linux only).

Turn off user-defined name hashing in shaders.

Disable shared workers.

Disables sending signin scoped device id to LSO with refresh token request.

The “disable” flag for kEnableSingleClickAutofill.

Disable paint invalidation based on slimming paint. See kEnableSlimmingPaintInvalidation.

No description

Disable smooth scrolling for testing.

Disables the use of a 3D software rasterizer.

Disables the Web Speech API.

Disables the Suggestions UI

Disables syncing browser data to a Google Account.

No description

Disables syncing one or more sync data types that are on by default. See sync/base/model_type.h for possible types. Types should be comma separated, and follow the naming convention for string representation of model types, e.g.: --disable-synctypes='Typed URLs, Bookmarks, Autofill Profiles'

Disables SystemTimezoneAutomaticDetection policy.

Enables tab for desktop sharing.

Disables the tab strip auto scroll new tabs.

No description

Disable multithreaded GPU compositing of web content.

Disable multithreaded, compositor scrolling of web content.

Disables touch adjustment.

Disables touch event based drag and drop.

Allows disabling of translate from the command line to assist with automated browser testing (e.g. Selenium/WebDriver). Normal browser users should disable translate with the preference.

The constant OS_MACOSX must be defined.

Disables Translate experimental new UX which replaces the infobar.

The constant OS_WIN must be defined.

Disables the USB keyboard detection for blocking the OSK on Win8+.

Disable V8 idle tasks.

The constant OS_CHROMEOS must be defined.

Disables VA-API accelerated video encode.

Specifies if a heuristic should be used to determine the most probable target of a gesture, where the touch region is represented by a rectangle.

No description

No description

Disables volume adjust sound.

Disables wake on wifi features.

Disables Web Notification custom layouts.

Don’t enforce the same-origin policy. (Used by people testing their sites.)

Disable experimental WebGL support.

Disables WebGL rendering into a scanout buffer for overlay support.

The constant BUILDFLAG(ENABLE_WEBRTC) must be defined.

Disables encryption of RTP Media for WebRTC. When Chrome embeds Content, it ignores this switch on its stable and beta channels.

The constant BUILDFLAG(ENABLE_WEBRTC) must be defined.

Disables HW decode acceleration for WebRTC.

The constant BUILDFLAG(ENABLE_WEBRTC) must be defined.

Disables HW encode acceleration for WebRTC.

The constant BUILDFLAG(ENABLE_WEBRTC) must be defined.

Disables HW VP8 encode acceleration for WebRTC.

The constant OS_WIN must be defined.

Disables the Win32K process mitigation policy for child processes.

Disables Blink’s XSSAuditor. The XSSAuditor mitigates reflective XSS.

Some tests seem to require the application to close when the last browser window is closed. Thus, we need a switch to force this behavior for ChromeOS Aura, disable “zero window mode”. TODO(pkotwicz): Investigate if this bug can be removed. (http://crbug.com/119175)

Disable rasterizer that writes directly to GPU memory associated with tiles.

Disable the video decoder from drawing directly to a texture.

disabled: touch events are disabled.

Use a specific disk cache location, rather than one derived from the UserDatadir.

Forces the maximum disk space to be used by the disk cache, in bytes.

The constant OS_CHROMEOS must not be defined.

Which X11 display to connect to. Emulates the GTK+ --display= command line argument.

The constant OS_MACOSX must be defined.

When switches::kProcessType is switches::kRelauncherProcess, if this switch is also present, the relauncher process will unmount and eject a mounted disk image and move its disk image file to the trash. The argument’s value must be a BSD device name of the form “diskN” or “diskNsM”.

No description

Specifies if the |DOMAutomationController| needs to be bound in the renderer. This binding happens on per-frame basis and hence can potentially be a performance bottleneck. One should only enable it when automating dom based tests.

The constant BUILDFLAG(ENABLE_PLUGINS) must be defined.

This value is used as an option for |kEnableDefaultMediaSession|. Flash will be ducked when losing audio focus.

Requests that a running browser process dump its collected histograms to a given file. The file is overwritten if it exists.

Instructs headless_shell to print document.body.innerHTML to stdout.

EAFE path to use for Easy bootstrapping.

EAFE URL to use for Easy bootstrapping.

The constant NDEBUG must be defined.

No description

Overrides the path of Easy Unlock component app.

The constants USE_OZONE and USE_X11 must be defined.

Tells Chrome to do edge touch filtering. Useful for convertible tablet.

No description

No description

Enables extension options to be embedded in chrome://extensions rather than a new tab.

Causes the omnibox dropdown to emphasize the titles of URL suggestions for query-like inputs.

Emulate ESSL lowp and mediump float precisions by mutating the shaders to round intermediate values in ANGLE.

Enable accelerated 2D canvas.

The constant OS_WIN must be defined.

Enables experimental hardware acceleration for VP8/VP9 video decoding. Bitmask – 0x1=Microsoft, 0x2=AMD, 0x03=Try all.

The constant OS_ANDROID must be defined.

Enable the accessibility tab switcher.

Enables consistent identity features.

Enables AD functionality.

The constant OS_ANDROID must be defined.

Enable inverting of selection handles so that they are not clipped by the viewport boundaries.

Enables the display of a banner allowing the user to add a web app to their shelf (or platform-specific equivalent)

Enable the aggressive flushing of DOM Storage to minimize data loss.

Enables the Android Wallpapers App as the default app on Chrome OS.

The constant OS_MACOSX must be defined.

Enable the toolkit-views App Info dialog for Mac. This is accessible from chrome://apps and chrome://extensions and is already enabled on non-mac.

If set, the app list will be enabled as if enabled from CWS.

The constant OS_MACOSX must be defined.

Enables custom Cmd+` window cycling for platform apps and hosted apps.

Enable or disable appcontainer/lowbox for renderer on Win8+ platforms.

DEPRECATED. Please use --arc-availability=officially-supported. Enables starting the ARC instance upon session start.

Enables ARC OptIn flow in OOBE.

If the WebRTC logging private API is active, enables audio debug recordings.

The constant OS_ANDROID must be defined.

Enables showing suggestions in a keyboard accessory view.

Inform users that their browser is being controlled by an automated test.

Enables the benchmarking extensions.

Enable BLE Advertisiing in apps.

Enable one or more Blink runtime-enabled features. Use names from RuntimeEnabledFeatures.json5, separated by commas. Applied before kDisableBlinkFeatures, and after other flags that change these features.

Enables the multi-level undo system for bookmarks.

PlzNavigate: Use the experimental browser-side navigation path.

No description

Enables dynamic rendering pipeline switching to optimize the performance of 2d canvas

Enables defering image decodes to the image decode service.

Enables native ChromeVox support for Arc.

Enables data volume counters in the Clear Browsing Data dialog.

This applies only when the process type is “service”. Enables the Cloud Print Proxy component within the service process.

The constant OS_WIN must be defined.

Fallback to XPS. By default connector uses CDD.

Convert rasterization and compositing inputs to the output color space before operating on them.

Changes the behavior of the “default” color space conversion mode in createImageBitmap. When enabled without kEnableColorCorrectRendering or kEnableTrueColorRendering flags, “default” means color correct the image bitmap to the display color space.

Enables consumer kiosk mode for Chrome OS.

The constant OS_ANDROID must be defined.

Enable content intent detection in the renderer.

Enables Contextual Search.

Indicates that crash reporting should be enabled. On platforms where helper processes cannot access to files needed to make this decision, this flag is generated internally.

The constant OS_POSIX must be defined.

Used for turning on Breakpad crash reporting in a debug environment where crash reporting is typically compiled but disabled.

Enable package hash check: the .crx file sha256 hash sum should be equal to the one received from update manifest.

Enable the data reduction proxy bypass warning.

Enables the origin of the carrier test data reduction proxy.

Enables sending a pageload metrics pingback after every page load.

Enables lite page from the data reduction proxy. This means a lite page should be requested instead of placeholders whenever Lo-Fi mode is on. Lo-fi must also be enabled via a flag or field trial.

Enables a 1 MB savings promo for the data reduction proxy.

Enables Data Saver prompt on cellular networks.

The constant OS_ANDROID must not be defined, and the constant BUILDFLAG(ENABLE_PLUGINS) must be defined.

Use a media session for each tabs in a way that two tabs can’t play on top of each other. This is different from the Media Session API as it is enabling a default behaviour for the browser. The allowed values are: “” (empty), |kEnableDefaultMediaSessionDuckFlash|.

Enable device discovery notifications.

If true devtools experimental settings are enabled.

Enables display list based 2d canvas implementation. Options: 1. Enable: allow browser to use display list for 2d canvas (browser makes decision). 2. Force: browser always uses display list for 2d canvas.

Enables using signed distance fields when rendering text. Only valid if GPU rasterization is enabled as well.

No description

No description

Enables Domain Reliability Monitoring.

Enables the string change from “Save Image” to “Download Image”.

Enable/disable drive search in chrome launcher.

Try to enable drm atomic. This works only with drm platform.

Hack so that feature switch can work with about_flags. See kEnableScriptsRequireAction.

Enable OpenGL ES 3 APIs.

The constant OS_WIN must be defined.

Use exclusive mode audio streaming for Windows Vista and higher. Leads to lower latencies for audio streams which uses the AudioParameters::AUDIO_PCM_LOW_LATENCY audio path. See http://msdn.microsoft.com/en-us/library/windows/desktop/dd370844.aspx for details.

Shows additional checkboxes in Settings to enable Chrome OS accessibility features that haven’t launched yet.

Enable experimental canvas features, e.g. canvas 2D context attributes

Enables extension APIs that are in development.

No description

Enables Web Platform features that are in development.

No description

Enables logging for extension activity.

Enables sharing assets for installed default apps.

Enable the fast unload controller, which speeds up tab/window close by running a tab’s onunload js handler independently of the GUI – crbug.com/142458 .

Enables a workaround for fast inset updates for UIWebView.scrollView.

Lists separated by commas the name of features to disable. See base::FeatureList::InitializeFromCommandLine for details.

Enables animated transitions during first-run tutorial.

No description

Enable font antialiasing for pixel tests.

The constant OS_MACOSX must be defined.

Enables tab detaching in fullscreen mode on Mac.

The constant OS_MACOSX must be defined.

Enables the fullscreen toolbar to reveal itself for tab strip changes.

The constant GOOGLE_CHROME_BUILD must be defined.

Shows a Google icon next to context menu items powered by Google services.

Makes the GL worker context run asynchronously by using a separate stream.

Enables the GPU benchmarking extension

Enable GPU client logging.

Enables TRACE for GL calls in the renderer.

Turn on Logging GPU commands.

Turn on Calling GL Error after every command.

Enable logging of GPU driver debug messages.

Specify that all compositor resources should be backed by GPU memory buffers.

Enable GpuMemoryBuffer backed VideoFrames.

Allow heuristics to determine when a layer tile should be drawn with the Skia GPU backend. Only valid with GPU accelerated compositing + impl-side painting.

Turns on GPU logging (debug build only).

Turns on calling TRACE for every GL call.

Enables grouping websites by domain and filtering them by period.

Enable compositing individual elements via hardware overlays when permitted by device. Setting the flag to “single-fullscreen” will try to promote a single fullscreen overlay and use it as main framebuffer where possible.

The constant OS_MACOSX must be defined.

Enables the HarfBuzz port of RenderText on Mac (it’s already used only for text editing; this enables it for everything else).

Use an fp16 scRGB swap chain compatible with HDR output.

Makes memory allocators keep track of their allocations and context, so a detailed breakdown of memory usage can be presented in chrome://tracing when the memory-infra category is enabled.

The constant OS_MACOSX must be defined.

Shows a notification when quitting Chrome with hosted apps running. Default behavior is to also quit all hosted apps.

The constant OS_MACOSX must be defined.

Allows hosted apps to be opened in windows on Mac.

The constant OS_ANDROID must be defined.

Enables chrome hosted mode for Android.

Enables experimental hotword features specific to always-on.

The constant OS_ANDROID must be defined.

Enables a hung renderer InfoBar allowing the user to close or wait on unresponsive web content.

Enables support for inband text tracks in media content.

Enables support for Handoff from Chrome on iOS to the default browser of other Apple devices.

Enable password generation for iOS.

Enables Physical Web scanning for nearby URLs.

Enables Kiosk mode for Chrome OS. Note this switch refers to retail mode rather than the kiosk app mode.

Switches cc machinery to use layer lists instead of layer trees

Enables LCD text.

Enables the leak detection of loading webpages. This allows us to check whether or not reloading a webpage releases web-related objects correctly.

Enable file accesses. It should not be enabled for most Cast devices.

Enabled the local sync backend implemented by the LoopbackServer.

Force logging to be enabled. Logging is disabled by default in release builds.

The constant OS_ANDROID must be defined.

Enable drag manipulation of longpress-triggered text selections.

Force low-end device mode when set.

When using CPU rasterizing generate low resolution tiling. Low res tiles may be displayed during fast scrolls especially on slower devices.

Enables the snapshot lru cache.

The constant OS_MACOSX must be defined.

Enables use of toolkit-views based native app windows.

Enables sending the next BeginMainFrame before the previous commit activates.

Enables the Material Design feedback form.

Enables the Material Design policy page at chrome://md-policy.

Suspend media pipeline on background tabs.

The constant OS_WIN must be defined.

Enables merging the key event (WM_KEY*) with the char event (WM_CHAR).

Enables message center to always move other notifications upwards when a notification is removed, no matter whether the message center is displayed top down or not.

Runs the Native Client inside the renderer process and enables GPU plugin (internally adds lEnableGpuPlugin to the command line).

Enables debugging via RSP over a socket.

Enables Non-SFI mode, in which programs can be run without NaCl’s SFI sandbox.

The constant OS_CHROMEOS must be defined.

Enables native cups integration

Enable native GPU memory buffer support when available.

Enables natural scroll by default.

Enables tracing for each navigation. It will attempt to trace each navigation for 10s, until the buffer is full, or until the next navigation. It only works if a URL was provided by --trace-upload-url.

Enables the network-related benchmarking extensions.

Enables the network information API.

Enables notifications about captive portals in session.

Enables the new bookmark app system.

Enables showing popular sites on the NTP.

Enables using the default search engine country to show country specific popular sites on the NTP.

Force showing the local save checkbox in the autofill dialog box for getting the full credit card number for a wallet card.

Enables offering to upload credit cards.

Enable auto-reload of error pages if offline.

Only auto-reload error pages when the tab is visible.

The constant OS_ANDROID must be defined.

Enables overscrolling for the OSK on Android.

Enables or disables overlay scrollbars in Blink (i.e. web content) on Aura or Linux. The status of native UI overlay scrollbars are determined in PlatformStyle::CreateScrollBar. Does nothing on Mac.

Enables extensions to hide bookmarks UI elements.

Enable partial raster in the renderer.

Enables password generation when we detect that the user is going through account creation.

Enable the Payment Request API.

Enables the testing interface for PPAPI.

The constant OS_WIN must be defined.

Enables per monitor DPI for supported Windows versions.

Enables permission action reporting to Safe Browsing servers for opted in users.

Enables suggestions while typing on a physical keyboard.

Enables compositor-accelerated touch-screen pinch gestures.

Forces tests to produce pixel output when they normally wouldn’t.

Enables testing features of the Plugin Placeholder. For internal use only.

Enables a number of potentially annoying security features (strict mixed content mode, powerful feature restrictions, etc.)

Enables the Power overlay in Settings.

Enables the proactive populating of the disk cache with Web resources that are likely to be needed in future page fetches.

Make the values returned to window.performance.memory more granular and more up to date in shared worker. Without this flag, the memory information is still available, but it is bucketized and updated less frequently. This flag also applys to workers.

Enable the creation of compositing layers when it would prevent LCD text.

Enables PrintBrowser mode, in which everything renders as though printed.

Enables showing unregistered printers in print preview

The constant OS_WIN must be defined.

Force-enables the profile shortcut manager. This is needed for tests since they use a custom-user-data-dir which disables this.

Enables tracking of tasks in profiler for viewing via about:profiler. To predominantly disable tracking (profiling), use the command line switch: --enable-profiling=0 Some tracking will still take place at startup, but it will be turned off during chrome_browser_main.

Enables discovery of the phone over Bluetooth Low Energy.

Enables close proximity detection. This allows the user to set a setting to require very close proximity between the remote device and the local device in order to unlock the local device, which trades off convenience for security.

Enable background mode for the Push API.

Enables the QUIC protocol. This is a temporary testing flag.

Enables context-sensitive reader mode button in the toolbar.

Enables request of tablet site (via user agent override).

Enables RGBA_4444 textures.

Enables the sandbox on this process.

Cause the OS X sandbox write to syslog every time an access to a resource is denied by the sandbox.

Enables using screenshots in tests and seets mode.

FeatureSwitch and about_flags don’t play nice. Feature switch expects either --enable-<feature> or --<feature>=1, but about_flags expects the command line argument to enable it (or a selection). Hack this in, so enabling it in about_flags enables the feature. Appending this flag has the same effect as --scripts-require-action=1.

Enable scroll prediction for scroll update events.

Enable the tracing service.

Enable settings in a separate browser window per profile (see SettingsWindowEnabled() below).

Enable use of the SGI_video_sync extension, which can have driver/sandbox/window manager compatibility issues.

Enables/disables suggestions without typing anything (on first click).

Enable the Site Engagement Eviction Policy which evicts temporary storage using the site engagement service. Implicitly enables the site engagement service.

Enables the site settings all sites list and site details pages in the Chrome settings UI.

Enables the Skia benchmarking extension

Enables paint invalidation based on slimming paint but without the full slimming paint v2 compositing code. See: https://goo.gl/eQczQW

Enables slimming paint phase 2: http://www.chromium.org/blink/slimming-paint

On platforms that support it, enables smooth scroll animation.

Enable spatial navigation

Enable the data reduction proxy.

The constant OS_CHROMEOS must not be defined, and the constant OS_LINUX must be defined.

Allows sending text-to-speech requests to speech-dispatcher, a common Linux speech service. Because it’s buggy, the user must explicitly enable it so that visiting a random webpage can’t cause instability.

The constant BUILDFLAG(ENABLE_SPELLCHECK) must be defined.

Enables participation in the field trial for user feedback to spelling service.

Enables the Spotlight actions.

Specifies if the |StatsCollectionController| needs to be bound in html pages. This binding happens on per-frame basis and hence can potentially be a performance bottleneck. One should only enable it when running a test that needs to access the provided statistics.

Enables StatsTable, logging statistics to a global named shared memory table.

Blocks all insecure requests from secure contexts, and prevents the user from overriding that decision.

Blocks insecure usage of a number of powerful features (device orientation, for example) that we haven’t yet deprecated for the web at large.

Enables the Suggestions UI

Enables suggestions with substring matching instead of prefix matching.

Enables the supervised user managed bookmarks folder.

Enables SwapBuffersWithBounds if it is supported.

Enable/disable syncing of the app list independent of extensions.

No description

Enables user control over muting tab audio from the tab strip.

Enable use of experimental TCP sockets API for sending data in the SYN packet.

Enables tethering to nearby LTE devices.

Enabled threaded compositing for layout tests.

Simulates shared textures when share groups are not available. Not available everywhere.

Enables fanciful thumbnail processing. Used with NTP for instant-extended-api, where thumbnails are generally smaller.

Compress tile textures for GPUs supporting it.

Enables the touch calibration option in MD settings UI for valid touch displays.

Enables touch event based drag and drop.

Enables touch support for screen magnifier.

Enables touchpad three-finger-click as middle button.

Enables the observation of accelerometer events to enter touch-view mode.

Pass launch source to platform apps.

Enable tracing during the execution of browser tests.

The filename to write the output of the test tracing to.

The constant OS_MACOSX must be defined.

Enables Translate experimental new UX which replaces the infobar.

Force all rasterization and compositing to be done in linear color space, with physically correct blending and interpolation.

Enables DevTools server for UI (mus, ash, etc). Value should be the port the server is started on. Default port is 9332.

Enable the mode that uses zooming to implment device scale factor behavior.

Enables Alternate-Protocol when the port is user controlled (> 1024).

The constant OS_MACOSX must be defined.

Enable user metrics from within the installer.

Enable screen capturing support for MediaStream API.

Enables the chromecast support for video player app.

Enables the use of the @viewport CSS rule, which allows pages to control aspects of their own layout. This also turns on touch-screen pinch gestures.

No description

Enables demuxing of vp9 in mp4. Note that this flag will not have any effect if MP4 demuxing is not enabled in the build.

Enable the Vtune profiler support.

Enable Vulkan support, must also have ENABLE_VULKAN defined.

The constant ENABLE_WAYLAND_SERVER must be defined.

Enables Wayland display server support.

Enables Web Notification custom layouts.

Enable WebFonts intervention and trigger the signal always.

WebFonts intervention v2 flag and values.

Enables WebGL extensions not yet approved by the community.

Enables WebGL rendering into a scanout buffer for overlay support.

If the WebRTC logging private API is active, enables WebRTC event logging.

The constant BUILDFLAG(ENABLE_WEBRTC) must be defined.

Enables Origin header in Stun messages for WebRTC.

Enables interaction with virtual reality devices.

Enables synchronizing WiFi credentials across devices, using Chrome Sync.

The constant OS_WIN must be defined.

Enables H264 HW decode acceleration for WebRtc on Win 7.

Enable rasterizer that writes directly to GPU memory associated with tiles.

enabled: touch events always enabled.

No description

No description

No description

Encode binary layout test results (images, audio) using base64.

No description

Enforce GL minimums.

The constant BUILDFLAG(ENABLE_WEBRTC) must be defined.

Enforce IP Permission check. TODO(guoweis): Remove this once the feature is not under finch and becomes the default.

No description

Disables ARC for managed accounts.

Whether to enable forced enterprise re-enrollment.

Enables the zero-touch enterprise enrollment flow.

Power of the power-of-2 initial modulus that will be used by the auto-enrollment client. E.g. “4” means the modulus will be 2^4 = 16.

Power of the power-of-2 maximum modulus that will be used by the auto-enrollment client.

Allows the ErrorConsole to collect runtime and manifest errors, and display them in the chrome:extensions page.

Explicitly allows additional ports using a comma-separated list of port numbers.

Exposes the window.internals object to JavaScript for interactive development and debugging of layout tests that rely on it.

Name of the command line flag to force content verification to be on in one of various modes.

Marks a renderer as extension process.

Turns on extension install verification if it would not otherwise have been turned on.

Enables multiple account versions of chrome.identity APIs.

Specifies a comma-separated list of extension ids that should be forced to be treated as not from the webstore when doing install verification.

Enables extensions running scripts on chrome:// URLs. Extensions still need to explicitly request access to chrome:// URLs in the manifest.

Frequency in seconds for Extensions auto-update.

Additional query params to insert in the search and instant URLs. Useful for testing.

Fakes the channel of the browser for purposes of Variations filtering. This is to be used for testing only. Possible values are “stable”, “beta”, “dev” and “canary”. Note that this only applies if the browser’s reported channel is UNKNOWN.

Value indicating whether flag from command line switch is false.

Defines that Material Design visual feedback animations should be fast.

If this flag is present then this command line is being delegated to an already running chrome process via the fast path, ie: before chrome.dll is loaded. It is useful to tell the difference for tracking purposes.

Alternative feedback server to use when submitting user feedback

Handle to the shared memory segment containing field trial state that is to be shared between processes. The argument to this switch is the handle id (pointer on Windows) as a string, followed by a comma, then the size of the shared memory segment as a string.

Passed to Chrome the first time that it’s run after the system boots. Not passed on restart after sign out.

These two flags are added around the switches about:flags adds to the command line. This is useful to see which switches were added by about:flags on about:version. They don’t have any effect.

No description

The constant OS_WIN must be defined.

DirectWrite FontCache is shared by browser to renderers using shared memory. This switch allows us to pass the shared memory handle to the renderer.

Forces Android application mode. This hides certain system UI elements and forces the app to be installed if it hasn’t been already.

Forces application mode. This hides certain system UI elements and forces the app to be installed if it hasn’t been already.

Forces Desktop to iOS promotion to appear in windows whenever an entrypoint is triggered.

Whether to force developer mode extensions highlighting.

Overrides the device scale factor for the browser UI and the contents.

No description

This option can be used to force parameters of field trials when testing changes locally. The argument is a param list of (key, value) pairs prefixed by an associated (trial, group) pair. You specify the param list for multiple (trial, group) pairs with a comma separator. Example: “Trial1.Group1:k1/v1/k2/v2,Trial2.Group2:k3/v3/k4/v4” Trial names, groups names, parameter names, and value should all be URL escaped for all non-alphanumeric characters.

This option can be used to force field trials when testing changes locally. The argument is a list of name and value pairs, separated by slashes. If a trial name is prefixed with an asterisk, that trial will start activated. For example, the following argument defines two trials, with the second one activated: “GoogleNow/Enable/*MaterialDesignNTP/Default/” This option can also be used by the browser process to send the list of trials to a non-browser process, using the same format. See FieldTrialList::CreateTrialsFromString() in field_trial.h for details.

Displays the First Run experience when the browser is started, regardless of whether or not it’s actually the First Run (this overrides kNoFirstRun).

Forces first-run UI to be shown for every login.

Sets the total amount of memory that may be allocated for GPU resources

Always use the Skia GPU backend for drawing layer tiles. Only valid with GPU accelerated compositing + impl-side painting. Overrides the kEnableGpuRasterization flag.

Force enables the Happiness Tracking System for the device. This ignores user profile check and time limits and shows the notification every time for any type of user. Should be used only for testing.

Force easy unlock app loading in test. TODO(xiyuan): Remove this when app could be bundled with Chrome.

Forces Chrome to use localNTP instead of server (GWS) NTP.

Usually in browser tests the usual login manager bringup is skipped so that tests can change how it’s brought up. This flag disables that.

The constant OS_WIN must be defined.

Force the use of MediaFoundation for video capture. This is only supported in Windows 7 and above. Used, like |kForceDirectShowVideoCapture|, to troubleshoot problems in Windows platforms.

Forces use of hardware overlay for fullscreen video playback. Useful for testing the Android overlay fullscreen functionality on other platforms.

Force use of the Subzero as the PNaCl translator instead of LLC.

Force renderer accessibility to be on instead of enabling it on demand when a screen reader is detected. The disable-renderer-accessibility switch overrides this if present.

The constant OS_ANDROID must be defined.

Forces the update menu badge to show.

The constant OS_ANDROID must be defined.

Forces the update menu item to show.

Force system compositor mode when set.

Force the UI to a specific direction. Valid values are “ltr” (left-to-right) and “rtl” (right-to-left).

Forces additional Chrome Variation Ids that will be sent in X-Client-Data header, specified as a 64-bit encoded list of numeric experiment ids. Ids prefixed with the character “t” will be treated as Trigger Variation Ids.

Force media player using SurfaceView instead of SurfaceTexture on Android.

The constant OS_WIN must be defined.

Use Windows WaveOut/In audio API even if Core Audio is supported.

The constant BUILDFLAG(ENABLE_WEBRTC) must be defined.

Override WebRTC IP handling policy to mimic the behavior when WebRTC IP handling policy is specified in Preferences.

Generates full memory crash dump.

No description

Sets the checkin service endpoint that will be used for performing Google Cloud Messaging checkins.

Sets the Mobile Connection Server endpoint that will be used for Google Cloud Messaging.

Sets the registration endpoint that will be used for creating new Google Cloud Messaging registrations.

For development / testing only. When running content_browsertests, saves output of failing accessibility tests to their expectations files in content/test/data/accessibility/, overwriting existing file content.

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Renders a green border around GL composited texture quads to help debug and study overlay support.

Include ANGLE’s intermediate representation (AST) output in shader compilation info logs.

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Screenshot testing: specifies the directory where the golden screenshots are stored.

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Specifies an alternate URL to use for speaking to Google. Useful for testing.

Overrides the URL used to fetch the current Google Doodle.

Enables using GAIA information to populate profile name and icon.

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Passes active gpu device id from browser process to GPU process.

Passes active gpu vendor id from browser process to GPU process.

Passes gpu device_id from browser process to GPU process.

Pass a set of GpuDriverBugWorkaroundType ids, seperated by ‘,’.

Passes gpu driver_date from browser process to GPU process.

Passes gpu driver_vendor from browser process to GPU process.

Passes gpu driver_version from browser process to GPU process.

Extra command line options for launching the GPU process (normally used for debugging). Use like renderer-cmd-prefix.

Testing switch to not launch the gpu process for full gpu info collection.

Inform Chrome that a GPU context will not be lost in power saving mode, screen saving mode, etc. Note that this flag does not ensure that a GPU context will never be lost in any situations, say, a GPU reset.

Makes this process a GPU sub-process.

Sets the maximum size of the in-memory gpu program cache, in kb

The number of multisample antialiasing samples for GPU rasterization. Requires MSAA support on GPU to have an effect. 0 disables MSAA.

Allows shmat() system call in the GPU sandbox.

Makes GPU sandbox failures fatal.

Starts the GPU sandbox before creating a GL context.

Passes secondary gpu device ids from browser process to GPU process.

Passes secondary gpu vendor ids from browser process to GPU process.

Causes the GPU process to display a dialog on launch.

Override gpu device id from the GpuInfoCollector.

Override gpu driver date from the GpuInfoCollector.

Override gl renderer from the GpuInfoCollector.

Override gl vendor from the GpuInfoCollector.

Override gl version from the GpuInfoCollector.

Override os version from GpuControlList::MakeDecision.

Override secondary gpu device ids from the GpuInfoCollector.

Override secondary gpu vendor ids from the GpuInfoCollector.

Override gpu vendor id from the GpuInfoCollector.

Passes gpu vendor_id from browser process to GPU process.

Large wallpaper to use in guest mode (as path to trusted, non-user-writable JPEG file).

Small wallpaper to use in guest mode (as path to trusted, non-user-writable JPEG file).

The constants OS_CHROMEOS and OS_MACOSX must not be defined, and the constant OS_POSIX must be defined.

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If true, the Chromebook has a keyboard with a diamond key.

Run in headless mode, i.e., without a UI or display server dependencies.

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“Hide” value for kCrosRegionsMode (VPD values are hidden).

The constant OS_WIN must be defined.

Makes Windows happy by allowing it to show “Enable access to this program” checkbox in Add/Remove Programs->Set Program Access and Defaults. This only shows an error box because the only way to hide Chrome is by uninstalling it.

Hide scrollbars from screenshots.

Don’t allow content to arbitrarily append to the back/forward list. The page must prcoess a user gesture before an entry can be added.

Defines user homedir. This defaults to primary user homedir.

Specifies which page will be displayed in newly-opened tabs. We need this for testing purposes so that the UI tests don’t depend on what comes up for http://google.com.

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With this switch, start remora OOBE with the pairing screen.

The maximum number of retry attempts to resolve the host. Set this to zero to disable host resolver retry attempts.

These mappings only apply to the host resolver.

Comma-separated list of rules that control how hostnames are mapped. For example: “MAP * 127.0.0.1” –> Forces all hostnames to be mapped to 127.0.0.1 “MAP *.google.com proxy” –> Forces all google.com subdomains to be resolved to “proxy”. “MAP test.com [::1]:77 –> Forces “test.com” to resolve to IPv6 loopback. Will also force the port of the resulting socket address to be 77. “MAP * baz, EXCLUDE www.google.com” –> Remaps everything to “baz”, except for “www.google.com“. These mappings apply to the endpoint host in a net::URLRequest (the TCP connect and host resolver in a direct connection, and the CONNECT in an http proxy connection, and the endpoint host in a SOCKS proxy connection).

The path where ICU initialization data can be found. If not provided, the service binary’s directory is assumed.

Ignores autocomplete=”off” for Autofill data (profiles + credit cards).

Ignores certificate-related errors.

Ignores GPU blacklist.

By default, if any CDM host (including signature) file is missing, the CDM will not be called to verify the host. Enable this switch to ignore missing CDM host files. This can be used in tests.

Causes net::URLFetchers to ignore requests for SSL client certificates, causing them to attempt an unauthenticated SSL/TLS session. This is intended for use when testing various service URLs (eg: kPromoServerURL, kSbURLPrefix, kSyncServiceURL, etc).

If true, profile selection in UserManager will always return active user’s profile. TODO(nkostlyev): http://crbug.com/364604 – Get rid of this switch after we turn on multi-profile feature on ChromeOS.

Run the GPU process as a thread in the browser process.

Causes the browser to launch directly in incognito mode.

Makes all APIs reflect the layout viewport.

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Causes Chrome to initiate an installation flow for the given app.

A list of whitelists to install for a supervised user, for testing. The list is of the following form: <id>[:<name>],[<id>[:<name>],…]

Marks a renderer as an Instant process.

The URL for the interests API.

Invalidation service should use GCM network channel even if experiment is not enabled.

Overrides the timeout, in seconds, that a child process waits for a connection from the browser before killing itself.

The constant ENABLE_IPC_FUZZER must be defined.

Dumps IPC messages sent from renderer processes to the browser process to the given directory. Used primarily to gather samples for IPC fuzzing.

The constant ENABLE_IPC_FUZZER must be defined.

Specifies the testcase used by the IPC fuzzer.

Chrome is running in Mash.

Enables site isolation for all chrome-extension:// urls.

Enable site isolation (--site-per-process style isolation) for a subset of sites. The argument is a wildcard pattern which will be matched against the site URL to determine which sites to isolate. This can be used to isolate just one top-level domain, or just one scheme. Example usages: --isolate-sites-for-testing=*.com --isolate-sites-for-testing=https://*

Enables experimental Harmony (ECMAScript 6) features.

Specifies the flags passed to JS engine

Used for testing – keeps browser alive after last browser window closes.

Enable kiosk mode. Please note this is not Chrome OS kiosk mode.

Enable automatically pressing the print button in print preview.

The language file that we want to try to open. Of the form language[-country] where language is the 2 letter code from ISO-639.

Pass the app id information to the renderer process, to be used for logging. last-launched-app should be the app that just launched and is spawning the renderer.

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Loads an app from the specified directory and launches it.

Path to a comma-separated list of apps to load at startup. The first app in the list will be launched.

Loads an extension from the specified directory.

Loads the Media Router component extension on startup.

Removes the requirement that we recieved a ping from the autofill servers and that the user doesn’t have the given form blacklisted. Used in testing.

The constant GOOGLE_CHROME_BUILD must not be defined.

Enables a live-reload for local NTP resources. This only works when Chrome is running from a Chrome source directory.

Specifies the local sync backend directory. The name is chosen to mimic user-data-dir etc. This flag only matters if the enable-local-sync-backend flag is present.

Logs GPU control list decisions when enforcing blacklist rules.

Sets the minimum log level. Valid values are from 0 to 3: INFO = 0, WARNING = 1, LOG_ERROR = 2, LOG_FATAL = 3.

Enables saving net log events to a file and sets the file name to use.

Enables Chrome-as-a-login-manager behavior.

Specifies the profile to use once a chromeos user is logged in. This parameter is ignored if user goes through login screen since user_id hash defines which profile directory to use. In case of browser restart within active session this parameter is used to pass user_id hash for primary user.

Specifies the user which is already logged in.

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Resizes of the main frame are caused by changing between landscape and portrait mode (i.e. Android) so the page should be rescaled to fit.

The constant OS_MACOSX must be defined.

Indicates whether Chrome should be set as the default browser during installation.

Makes Chrome default browser

Sets the supervised user ID for any loaded or newly created profile to the given value. Pass an empty string to mark the profile as non-supervised. Used for testing.

Used to authenticate requests to the Sync service for supervised users. Setting this switch also causes Sync to be set up for a supervised user.

Use to opt-in to marking HTTP as non-secure.

The constant OS_ANDROID must be defined.

Sets the market URL for Chrome for use in testing.

The constant BUILDFLAG(ENABLE_PACKAGE_MASH_SERVICES) must be defined.

Used to enable Mus+ash.

Material design mode for the |kTopChromeMD| switch.

Defines the speed of Material Design visual feedback animations.

Material design hybrid mode for the |kTopChromeMD| switch. Targeted for mouse/touch hybrid devices.

The constant BUILDFLAG(ENABLE_WEBRTC) must be defined.

Override the maximum framerate as can be specified in calls to getUserMedia. This flag expects a value. Example: --max-gum-fps=17.5

Sets the width and height above which a composited layer will get tiled.

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Forces the maximum disk space to be used by the media cache, in bytes.

Some platforms typically have very little ‘free’ memory, but plenty is available in buffers+cached. For such platforms, configure this amount as the portion of buffers+cached memory that should be treated as unavailable. If this switch is not used, a simple pressure heuristic based purely on free memory will be used.

Sample memory usage with high frequency and store the results to the Renderer.Memory histogram. Used in memory tests.

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The memory pressure threshold selection which is used to decide whether and when a memory pressure event needs to get fired.

The constant OS_WIN must be defined.

Sets the free memory thresholds below which the system is considered to be under moderate and critical memory pressure. Used in the browser process, and ignored if invalid. Specified as a pair of comma separated integers. See base/win/memory_pressure_monitor.cc for defaults.

Flag to enable or disable notification changes while the message center opens. This flag will be removed once the feature gets stable.

The constant OS_MACOSX must be defined.

This is how the metrics client ID is passed from the browser process to its children. With Crashpad, the metrics client ID is distinct from the crash client ID.

Enables the recording of metrics reports but disables reporting. In contrast to kDisableMetrics, this executes all the code that a normal client would use for reporting, except the report is dropped rather than sent to the server. This is useful for finding issues in the metrics code during UI and performance tests.

Sets options for MHTML generator to skip no-store resources: “skip-nostore-main” – fails to save a page if main frame is ‘no-store’ “skip-nostore-all” – also skips no-store subresources.

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The token to use to construct the message pipe on which to layer ChannelMojo.

Use a Mojo-based LocalStorage implementation.

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Allows setting a different destination ID for connection-monitoring GCM messages. Useful when running against a non-prod management server.

Allows explicitly specifying MSE audio/video buffer sizes. Default values are 150M for video and 12M for audio.

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Mutes audio sent to the audio device so it is not audible during automated testing.

Value for --type that causes the process to run as a NativeClient broker (used for launching NaCl loader processes on 64-bit Windows).

Disable sandbox even for non SFI mode. This is particularly unsafe as non SFI NaCl heavily relies on the seccomp sandbox.

Uses NaCl manifest URL to choose whether NaCl program will be debugged by debug stub. Switch value format: [!]pattern1,pattern2,…,patternN. Each pattern uses the same syntax as patterns in Chrome extension manifest. The only difference is that * scheme matches all schemes instead of matching only http and https. If the value doesn’t start with !, a program will be debugged if manifest URL matches any pattern. If the value starts with !, a program will be debugged if manifest URL does not match any pattern.

Native Client GDB debugger that will be launched automatically when needed.

GDB script to pass to the nacl-gdb debugger at startup.

Value for --type that causes the process to run as a NativeClient loader for SFI mode.

Value for --type that causes the process to run as a NativeClient loader for non SFI mode.

Report native (walk the stack) allocation traces. By default pseudo stacks derived from trace events are reported.

Enables the use of C++-based extension bindings (instead of JS generation).

Sets the granularity of events to capture in the network log. The mode can be set to one of the following values: “Default” “IncludeCookiesAndCredentials” “IncludeSocketBytes” See the functions of the corresponding name in net_log_capture_mode.h for a description of their meaning.

List of network interfaces to ignore. Ignored interfaces will not be used for network connectivity.

The constant OS_ANDROID must be defined.

The telephony region (ISO country code) to use in phone number detection.

Enables new profile management system, including lock mode.

Launches URL in new browser window.

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Disables the default browser check. Useful for UI/browser tests where we want to avoid having the default browser info-bar displayed.

Disables all experiments set on about:flags. Does not disable about:flags itself. Useful if an experiment makes chrome crash at startup: One can start chrome with --no-experiments, disable the problematic lab at about:flags and then restart chrome without this switch again.

Skip First Run tasks, whether or not it’s actually the First Run. Overridden by kForceFirstRun. This does not drop the First Run sentinel and thus doesn’t prevent first run from occuring the next time chrome is launched without this flag.

Disables checking whether we received an acknowledgment when registering a supervised user. Also disables the timeout during registration that waits for the ack. Useful when debugging against a server that does not support notifications.

The constant OS_WIN must be defined.

Whether or not the browser should warn if the profile is on a network share. This flag is only relevant for Windows currently.

Don’t send hyperlink auditing pings

Don’t use a proxy server, always make direct connections. Overrides any other proxy server flags that are passed.

Don’t send HTTP-Referer headers.

Disables the sandbox for all process types that are normally sandboxed.

Disables the service process from adding itself as an autorun process. This does not delete existing autorun registrations, it just prevents the service from registering a new one.

Does not automatically open a browser window on startup (used when launching Chrome for the purpose of hosting background apps).

Do not use the mojo UI Service in the Chrome render process.

Disable features that require WiFi management.

Disables the use of a zygote process for forking child processes. Instead, child processes will be forked and exec’d directly. Note that --no-sandbox should also be used together with this flag because the sandbox needs the zygote to work.

Suppresses all error dialogs when present.

Classic, non-material, mode for the |kTopChromeMD| switch.

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An optional comma-separated list of IDs of apps that can be used to take notes. If unset, a hardcoded list is used instead.

If this flag is set, we will add downloaded snippets that are missing some critical data to the list.

The constant OS_ANDROID must be defined.

Switch to an existing tab for a suggestion opened from the New Tab Page.

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Specifies the maximum number of threads to use for running the Proxy Autoconfig (PAC) script.

Number of worker threads used to rasterize content.

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Indicates that if we should start bootstrapping Master OOBE.

Indicates that a guest session has been started before OOBE completion.

Skips all other OOBE pages after user login.

Interval at which we check for total time on OOBE.

The constant USE_ASH must be defined.

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Specifies a comma separated list of host-port pairs to force use of QUIC on.

Contains a list of feature names for which origin trial experiments should be disabled. Names should be separated by “|” characters.

Overrides the default public key for checking origin trial tokens.

The time that a new chrome process which is delegating to an already running chrome process started. (See ProcessSingleton for more details.)

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“Override” value for kCrosRegionsMode (region’s data is read first).

Override the URL to which metrics logs are sent for debugging.

Override the behavior of plugin throttling for testing. By default the throttler is only enabled for a hard-coded list of plugins. Set the value to ‘always’ to always throttle every plugin instance.

Forces the use of software GL instead of hardware gpu.

Controls the behavior of history navigation in response to horizontal overscroll. Set the value to ‘0’ to disable. Set the value to ‘1’ to enable the behavior where pages slide in and out in response to the horizontal overscroll gesture and a screenshot of the target page is shown. Set the value to ‘2’ to enable the simplified overscroll UI where a navigation arrow slides in from the side of the screen in response to the horizontal overscroll gesture. Defaults to ‘1’.

Specify location for image dumps.

Specify ozone platform implementation to use.

Packages an extension to a .crx installable file from a given directory.

Optional PEM private key to use in signing packaged .crx.

Specifies the path to the user data folder for the parent profile.

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Override the default value for the ‘passive’ field in javascript addEventListener calls. Values are defined as: ‘documentonlytrue’ to set the default be true only for document level nodes. ‘true’ to set the default to be true on all nodes (when not specified). ‘forcealltrue’ to force the value on all nodes.

The constants OS_CHROMEOS and OS_MACOSX must not be defined, and the constant OS_POSIX must be defined.

Specifies which encryption storage backend to use. Possible values are kwallet, kwallet5, gnome, gnome-keyring, gnome-libsecret, basic. Any other value will lead to Chrome detecting the best backend automatically. TODO(crbug.com/571003): Once PasswordStore no longer uses the Keyring or KWallet for storing passwords, rename this flag to stop referencing passwords. Do not rename it sooner, though; developers and testers might rely on it keeping large amounts of testing passwords out of their Keyrings or KWallets.

Development flag for permission request API. This flag is needed until the API is finalized. TODO(bauerb): Remove when this flag is not needed anymore.

Development flag for permission request API. This flag is needed until the API is finalized. TODO(bauerb): Remove when this flag is not needed anymore.

Specifies power stub behavior: ‘cycle=2’ – Cycles power states every 2 seconds. See FakeDBusThreadManager::ParsePowerCommandLineSwitch for full details.

Argument to the process type that indicates a PPAPI plugin process type.

The constant OS_WIN must be defined.

The boolean value (0/1) of FontRenderParams::antialiasing to be passed to Ppapi processes.

Argument to the process type that indicates a PPAPI broker process type.

“Command-line” arguments for the PPAPI Flash; used for debugging options.

Use the PPAPI (Pepper) Flash found at the given path.

Report the given version for the PPAPI (Pepper) Flash. The version should be numbers separated by ‘.’s (e.g., “12.3.456.78”). If not specified, it defaults to “10.2.999.999”.

Runs PPAPI (Pepper) plugins in-process.

Specifies a command that should be used to launch the ppapi plugin process. Useful for running the plugin process through purify or quantify. Ex: --ppapi-plugin-launcher="path\to\purify /Run=yes"

Causes the PPAPI sub process to display a dialog on launch. Be sure to use --no-sandbox as well or the sandbox won’t allow the dialog to display.

The constant OS_WIN must be defined.

The enum value of FontRenderParams::subpixel_rendering to be passed to Ppapi processes.

The URL that provides the PrecacheConfigurationSettings proto.

Precache manifests will be served from URLs with this prefix.

Triggers prerendering of pages from suggestions in the omnibox. Only has an effect when Instant is either disabled or restricted to search, and when prerender is enabled.

previous-app should be the app that was running when last-launched-app started.

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Provides a child process with a token string they can use to establish a primordial message pipe to the parent.

Use IPv6 only for privet HTTP.

Enable the “Process Per Site” process model for all domains. This mode consolidates same-site pages so that they share a single process.
More details here: – http://www.chromium.org/developers/design-documents/process-models – The class comment in site_instance.h, listing the supported process models.
IMPORTANT: This isn’t to be confused with --site-per-process (which is about isolation, not consolidation). You probably want the other one.

Runs each set of script-connected tabs (i.e., a BrowsingInstance) in its own renderer process. We default to using a renderer process for each site instance (i.e., group of pages from the same registered domain with script connections to each other).

The name of the service the process is starting for.

Outputs the product version information and quit. Used as an internal api to detect the installed version of Chrome on Linux.

Selects directory of profile to associate with the first browser launched.

Configure whether chrome://profiler will contain timing information. This option is enabled by default. A value of “0” will disable profiler timing, while all other values will enable it.

Starts the sampling based profiler for the browser process at startup. This will only work if chrome has been built with the gyp variable profiling=1. The output will go to the value of kProfilingFile.

Specifies a location for profiling output. This will only work if chrome has been built with the gyp variable profiling=1 or gn arg enable_profiling=true. {pid} if present will be replaced by the pid of the process. {count} if present will be incremented each time a profile is generated for this process. The default is chrome-profile-{pid} for the browser and test-profile-{pid} for tests.

Controls whether profile data is periodically flushed to a file. Normally the data gets written on exit but cases exist where chrome doesn’t exit cleanly (especially when using single-process). A time in seconds can be specified.

The constant OS_ANDROID must be defined.

Specifies Android phone page loading progress bar animation.

The constant OS_ANDROID must be defined.

When blink should declare a load “done” for the purpose of the progress bar.

The constant CHROMIUM_BUILD must be defined.

Should we prompt the user before allowing external extensions to install? This flag is available on Chromium for testing purposes.

Forces proxy auto-detection.

Specifies a list of hosts for whom we bypass proxy settings and use direct connections. Ignored if --proxy-auto-detect or --no-proxy-server are also specified. This is a comma-separated list of bypass rules. See: “net/proxy/proxybypassrules.h” for the format of these rules.

Uses the pac script at the given URL

Uses a specified proxy server, overrides system settings. This switch only affects HTTP and HTTPS requests.

Specifies a comma separated list of QUIC connection options to send to the server.

Specifies a comma separated list of hosts to whitelist QUIC for.

Specifies the maximum length for a QUIC packet.

Specifies the version of QUIC to use.

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The constant BUILDFLAG(ENABLE_PLUGINS) must be defined.

Makes browser pixel tests overwrite the reference if it does not match.

Enables more web features over insecure connections. Designed to be used for testing purposes only.

Reduce the default referer header’s granularity.

Registers additional font files on Windows (for fonts outside the usual %WINDIR%\Fonts location). Multiple files can be used by separating them with a semicolon (;).

Register Pepper plugins (see pepper_plugin_list.cc for its format).

The constant OS_MACOSX must be defined.

A process type (switches::kProcessType) that relaunches the browser. See chrome/browser/mac/relauncher.h.

Use the given address instead of the default loopback for accepting remote debugging connections. Should be used together with --remote-debugging-port. Note that the remote debugging protocol does not perform any authentication, so exposing it too widely can be a security risk.

Enables remote debug over HTTP on the specified port.

The constant OS_ANDROID must be defined.

Enables remote debug over HTTP on the specified socket name.

Porvides a list of addresses to discover DevTools remote debugging targets. The format is <host>:<port>,…,<host>:port.

Causes the process to run as renderer instead of as browser.

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The contents of this flag are prepended to the renderer command line. Useful values might be “valgrind” or “xterm -e gdb –args”.

Overrides the default/calculated limit to the number of renderer processes. Very high values for this setting can lead to high memory/resource usage or instability.

Causes the renderer process to display a dialog on launch. Passing this flag also adds kNoSandbox on Windows non-official builds, since that’s needed to show a dialog.

The constant OS_ANDROID must be defined.

Block ChildProcessMain thread of the renderer’s ChildProcessService until a Java debugger is attached.

Runs a read-eval-print loop that allows the user to evaluate Javascript expressions.

Force to report VP9 as an unsupported MIME type.

When running tests on a system without the required hardware or libraries, this flag will cause the tests to fail. Otherwise, they silently succeed.

If set, the app list will forget it has been installed on startup. Note this doesn’t prevent the app list from running, it just makes Chrome think the app list hasn’t been enabled (as in kEnableAppList) yet.

Forces a reset of the one-time-randomized FieldTrials on this client, also known as the Chrome Variations state.

Indicates the last session should be restored on startup. This overrides the preferences value.

Handles frame scrolls via the root RenderLayer instead of the FrameView.

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Request the render trees of pages to be dumped as text once they have finished loading.

If present, safebrowsing only performs update when SafeBrowsingProtocolManager::ForceScheduleNextUpdate() is explicitly called. This is used for testing only.

TODO(lzheng): Remove this flag once the feature works fine (http://crbug.com/74848). Disables safebrowsing feature that checks download url and downloads content’s hash to make sure the content are not malicious.

Disables safebrowsing feature that checks for blacklisted extensions.

List of comma-separated sha256 hashes of executable files which the download-protection service should treat as “dangerous.” For a file to show a warning, it also must be considered a dangerous filetype and not be whitelisted otherwise (by signature or URL) and must be on a supported OS. Hashes are in hex. This is used for manual testing when looking for ways to by-pass download protection.

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Causes the process to run as a sandbox IPC subprocess.

Disable saving pages as HTML-only, disable saving pages as HTML Complete (with a directory of sub-resources). Enable only saving pages as MHTML. See http://crbug.com/120416 for how to remove this switch.

Switches ‘Save as…’ context and app menu labels to ‘Download…’.

Specifies the initial screen configuration, or state of all displays, for FakeDisplayDelegate, see class for format details.

Save a screenshot of the loaded page.

Notify the user and require consent for extensions running scripts. Appending --scripts-require-action=1 has the same effect as --enable-scripts-require-action (see below).

Enables or disables scroll end effect in response to vertical overscroll. Set the value to ‘1’ to enable the feature, and set to ‘0’ to disable. Defaults to disabled.

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Specifies the layout mode and offsets for the secondary display for testing. The format is “<t|r|b|l>,<offset>” where t=TOP, r=RIGHT, b=BOTTOM and L=LEFT. For example, ‘r,-100’ means the secondary display is positioned on the right with -100 offset. (above than primary)

Applies the material design mode passed via --top-chrome-md to elements throughout Chrome (not just top Chrome).

Causes the process to run as a service process.

Specifies a JSON file from which to read a set of service metadata overrides. This can be used with the standalone mojo_runner to override executable and package resolution behavior.

The token to use to construct the message pipe for a service in a child process.

Describes the file descriptors passed to the child process. List: <file id from manifest>:<global descriptor id>,<file id string from manifest> :<global descriptor id>,…

Overrides network stub behavior. By default, ethernet, wifi and vpn are enabled, and transitions occur instantaneously. Multiple options can be comma separated (no spaces). Note: all options are in the format ‘foo=x’. Values are case sensitive and based on Shill names in service_constants.h. See FakeShillManagerClient::SetInitialNetworkState for implementation. Examples: ‘clear=1’ – Clears all default configurations ‘wifi=on’ – A wifi network is initially connected (‘1’ also works) ‘wifi=off’ – Wifi networks are all initially disconnected (‘0’ also works) ‘wifi=disabled’ – Wifi is initially disabled ‘wifi=none’ – Wifi is unavailable ‘wifi=portal’ – Wifi connection will be in Portal state ‘cellular=1’ – Cellular is initially connected ‘cellular=LTE’ – Cellular is initially connected, technology is LTE ‘interactive=3’ – Interactive mode, connect/scan/etc requests take 3 secs

If true the app list will be shown.

Annotates forms and fields with Autofill signatures.

Annotates forms with Autofill field type predictions.

Makes component extensions appear in chrome://settings/extensions.

Renders a border around compositor layers to help debug and study layer compositing.

Draws a heads-up-display showing Frames Per Second as well as GPU memory usage. If you also use --enable-logging=stderr --vmodule="head*=1" then FPS will also be output to the console log.

The constant OS_WIN must be defined.

See kHideIcons.

Renders a border that represents the bounding box for the layer’s animation.

The constant OS_IOS must not be defined, and the constant OS_MACOSX must be defined.

Show borders around CALayers corresponding to overlays and partial damage.

Visualize overdraw by color-coding elements based on if they have other elements drawn underneath. This is good for showing where the UI might be doing more rendering work than necessary. The colors are hinting at the amount of overdraw on your screen for each pixel, as follows: True color: No overdraw. Blue: Overdrawn once. Green: Overdrawn twice. Pink: Overdrawn three times. Red: Overdrawn four or more times.

Visibly render a border around paint rects in the web page to help debug and study painting behavior.

Show rects in the HUD around layers whose properties have changed.

Command line flag offering a “Show saved copy” option to the user if offline. The various modes are disabled, primary, or secondary. Primary/secondary refers to button placement (for experiment).

Show rects in the HUD around the screen-space transformed bounds of every layer.

Show rects in the HUD around damage as it is recorded into each render surface.

The constant OS_ANDROID must be defined.

Forces a summary to be displayed below the update menu item.

Does not show an infobar when an extension attaches to a page using chrome.debugger page. Required to attach to extension background pages.

Causes Chrome to launch without opening any windows by default. Useful if one wishes to use Chrome as an ash server.

Simulates a critical update being available.

Simulates that elevation is needed to recover upgrade channel.

Simulates that current version is outdated.

Simulates that current version is outdated and auto-update is off.

Simulates an update being available.

Runs the renderer and plugins in the same process as the browser

Enforces a one-site-per-process security policy: * Each renderer process, for its whole lifetime, is dedicated to rendering pages for just one site. * Thus, pages from different sites are never in the same process. * A renderer process’s access rights are restricted based on its site. * All cross-site navigations force process swaps. * <iframe>s are rendered out-of-process whenever the src= is cross-site.
More details here: – http://www.chromium.org/developers/design-documents/site-isolation – http://www.chromium.org/developers/design-documents/process-models – The class comment in site_instance.h, listing the supported process models.
IMPORTANT: this isn’t to be confused with --process-per-site (which is about process consolidation, not isolation). You probably want this one.

Skip gpu info collection, blacklist loading, and blacklist auto-update scheduling at browser startup time. Therefore, all GPU features are available, and about:gpu page shows empty content. The switch is intended only for layout tests. TODO(gab): Get rid of this switch entirely.

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Skips reencoding bitmaps as PNGs when the encoded data is unavailable during SKP capture. This allows for obtaining an accurate sample of the types of images on the web, rather than being weighted towards PNGs that we have encoded ourselves.

Defines that Material Design visual feedback animations should be slow.

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Re-rasters everything multiple times to simulate a much slower machine. Give a scale factor to cause raster to take that many times longer to complete, such as --slow-down-raster-scale-factor=25.

Sends test messages on first call to RequestUpdate (stub only).

The origin of the data reduction proxy fallback.

The origin of the data reduction proxy.

A test key for data reduction proxy authentication.

The constant BUILDFLAG(ENABLE_SPELLCHECK) must be defined.

Specifies the number of seconds between sending batches of feedback to spelling service. The default is 30 minutes. The minimum is 5 seconds. This switch is for temporary testing only. TODO(rouslan): Remove this flag when feedback testing is complete. Revisit by August 2013.

The constant BUILDFLAG(ENABLE_SPELLCHECK) must be defined.

Specifies the URL where spelling service feedback data will be sent instead of the default URL. This switch is for temporary testing only. TODO(rouslan): Remove this flag when feedback testing is complete. Revisit by August 2013.

Causes SSL key material to be logged to the specified file for debugging purposes. See https://developer.mozilla.org/en-US/docs/Mozilla/Projects/NSS/Key_Log_Format for the format.

Specifies the maximum SSL/TLS version (“tls1”, “tls1.1”, “tls1.2”, or “tls1.3”).

Specifies the minimum SSL/TLS version (“tls1”, “tls1.1”, “tls1.2”, or “tls1.3”).

This makes us disable some web-platform runtime features so that we test content_shell as if it was a stable release. It is only followed when kRunLayoutTest is set. For the features’ level, see http://dev.chromium.org/blink/runtime-enabled-features.

Specifies if the browser should start in fullscreen mode, like if the user had pressed F11 right after startup.

Starts the browser maximized, regardless of any previous settings.

Starts the stack sampling profiler in the child process.

Value for kTestCrosGaiaIdMigration indicating that migration is started (i.e. all stored user keys will be converted to GaiaId)

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Indicates that a stub implementation of CrosSettings that stores settings in memory without signing should be used, treating current user as the owner. This also modifies OwnerSettingsServiceChromeOS::HandlesSetting such that no settings are handled by OwnerSettingsServiceChromeOS. This option is for testing the chromeos build of chrome on the desktop only.

Indicates whether the dual GPU switching is supported or not.

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