Use the chrome.accessibilityFeatures API to manage Chrome's accessibility features. This API relies on the ChromeSetting
prototype of the type API for getting and setting individual accessibility features. In order to get feature states the
extension must request accessibilityFeatures.read permission. For modifying feature state, the extension needs
accessibilityFeatures.modify permission. Note that accessibilityFeatures.modify does not imply accessibilityFeatures.read
permission.

  * available since Chrome 37
  * https://developer.chrome.com/extensions/accessibilityFeatures

  * available since Chrome 36

Use actions to put icons in the main Google Chrome toolbar, to the right of the address bar. Actions can be set to take
action on all pages (default_state: enabled) or only the current page (default_state: disabled). If an action is default
disabled, the action appears grayed out when inactive. In addition to its icon, an action can also have a tooltip, a
badge, and a popup.

  * available since Chrome master
  * https://developer.chrome.com/extensions/action

  * available since Chrome 31

Use the chrome.alarms API to schedule code to run
periodically or at a specified time in the future.

  * available since Chrome 27
  * https://developer.chrome.com/extensions/alarms

  * available since Chrome 27
* https://developer.chrome.com/extensions/app

Use the chrome.autofillPrivate API to add, remove, or update
autofill data from the settings UI.

  * available since Chrome master

The chrome.automation API allows developers to access the
automation (accessibility) tree for the browser. The tree resembles the DOM
tree, but only exposes the semantic structure of a page. It can be
used to programmatically interact with a page by examining names, roles, and
states, listening for events, and performing actions on nodes.

  * available since Chrome 72
  * https://developer.chrome.com/extensions/automation

API for integration testing. To be used on test images with a test component
extension.

  * available since Chrome 27

Use the chrome.bluetooth API to connect to a Bluetooth
device. All functions report failures via chrome.runtime.lastError.

  * available since Chrome 27
  * https://developer.chrome.com/extensions/bluetooth

Use the chrome.bluetoothPrivate API to control the Bluetooth
adapter state and handle device pairing.
NOTE: This IDL is dependent on bluetooth.idl.

  * available since Chrome 36

  * available since Chrome 27

Use the chrome.bookmarks API to create, organize, and otherwise manipulate bookmarks. Also see Override Pages, which you
can use to create a custom Bookmark Manager page.

  * available since Chrome 27
  * https://developer.chrome.com/extensions/bookmarks

Braille display access private API.

* available since Chrome 31

Use browser actions to put icons in the main Google Chrome toolbar, to the right of the address bar. In addition to its
icon, a browser action can have a tooltip, a badge, and a popup.

  * available since Chrome 27
  * https://developer.chrome.com/extensions/browserAction

Use the chrome.browsingData API to remove browsing data from a user's local profile.

* available since Chrome 27
* https://developer.chrome.com/extensions/browsingData

The chrome.cast.streaming.receiverSession API creates a Cast
receiver session and adds the resulting audio and video tracks to a
MediaStream.

  * available since Chrome 72
  * https://developer.chrome.com/extensions/cast.streaming.receiverSession

The chrome.cast.streaming.rtpStream API allows configuration
of encoding parameters and RTP parameters used in a Cast streaming
session.

Valid stream IDs are positive and non-zero.

  * available since Chrome 72
  * https://developer.chrome.com/extensions/cast.streaming.rtpStream

The chrome.cast.streaming.session API creates a Cast
session using WebMediaStreamTrack as sources. The session is composed
by RTP streams and a network transport.

Calling this API will generate corresponding resources for use with
chrome.cast.streaming.rtpStream and chrome.cast.streaming.udpTransport
APIs.

Valid resource IDs are positive and non-zero.

  * available since Chrome 72
  * https://developer.chrome.com/extensions/cast.streaming.session

The chrome.webrtc.castUdpTransport API represents a UDP
transport for Cast RTP streams. This API is not useful when standalone
since it does not have send and receive methods.
It is used to configure the UDP transport used in Cast session.

Valid transport IDs are positive and non-zero.

  * available since Chrome 72
  * https://developer.chrome.com/extensions/cast.streaming.udpTransport

Use this API to expose certificates to the platform which can use these
certificates for TLS authentications.

  * available since Chrome 46
  * https://developer.chrome.com/extensions/certificateProvider

  * available since Chrome 27

  * available since Chrome 27

  * available since Chrome 28

Use the commands API to add keyboard shortcuts that trigger actions in your extension, for example, an action to open the
browser action or send a command to the extension.

  * available since Chrome 27
  * https://developer.chrome.com/extensions/commands

Use the chrome.contentSettings API to change settings that control whether websites can use features such as cookies,
JavaScript, and plugins. More generally speaking, content settings allow you to customize Chrome's behavior on a per-site
basis instead of globally.

  * available since Chrome 27
  * https://developer.chrome.com/extensions/contentSettings

Use the chrome.contextMenus API to add items to Google Chrome's context menu. You can choose what types of objects your
context menu additions apply to, such as images, hyperlinks, and pages.

  * available since Chrome 27
  * https://developer.chrome.com/extensions/contextMenus

Use the chrome.cookies API to query and modify cookies, and to be notified when they change.

* available since Chrome 27
* https://developer.chrome.com/extensions/cookies

chrome.cryptotokenPrivate API that provides hooks to Chrome to
be used by cryptotoken component extension.
In the context of this API, an AppId is roughly an origin and is formally
defined in

the FIDO spec

  * available since Chrome 41

  * available since Chrome 46

The chrome.debugger API serves as an alternate transport for Chrome's remote debugging protocol. Use chrome.debugger to
attach to one or more tabs to instrument network interaction, debug JavaScript, mutate the DOM and CSS, etc. Use the
Debuggee tabId to target tabs with sendCommand and route events by tabId from onEvent callbacks.

  * available since Chrome 27
  * https://developer.chrome.com/extensions/debugger

Use the chrome.declarativeContent API to take actions depending on the content of a page, without requiring permission to
read the page's content.

  * available since Chrome 33
  * https://developer.chrome.com/extensions/declarativeContent

The chrome.declarativeNetRequest API is used to block or
redirect network requests by specifying declarative rules.

  * available since Chrome 72
  * https://developer.chrome.com/extensions/declarativeNetRequest

Note: this API is currently on hold, without concrete plans to move to stable. Use the chrome.declarativeWebRequest API to
intercept, block, or modify requests in-flight. It is significantly faster than the chrome.webRequest API because you can
register rules that are evaluated in the browser rather than the JavaScript engine, which reduces roundtrip latencies and
allows higher efficiency.

  * available since Chrome 71
  * https://developer.chrome.com/extensions/declarativeWebRequest

Desktop Capture API that can be used to capture content of screen, individual windows or tabs.

* available since Chrome 34
* https://developer.chrome.com/extensions/desktopCapture

developerPrivate API.
This is a private API exposing developing and debugging functionalities for
apps and extensions.

  * available since Chrome 27

Use the chrome.devtools.inspectedWindow API to interact with the inspected window: obtain the tab ID for the inspected
page, evaluate the code in the context of the inspected window, reload the page, or obtain the list of resources within
the page.

  * available since Chrome 27
  * https://developer.chrome.com/extensions/devtools.inspectedWindow

Use the chrome.devtools.network API to retrieve the information about network requests displayed by the Developer Tools in
the Network panel.

  * available since Chrome 27
  * https://developer.chrome.com/extensions/devtools.network

Use the chrome.devtools.panels API to integrate your extension into Developer Tools window UI: create your own panels,
access existing panels, and add sidebars.

  * available since Chrome 27
  * https://developer.chrome.com/extensions/devtools.panels

The chrome.displaySource API creates a Display
session using WebMediaStreamTrack as sources.

  * available since Chrome 72
  * https://developer.chrome.com/extensions/displaySource

Use the chrome.dns API for dns resolution.

* available since Chrome 72
* https://developer.chrome.com/extensions/dns

Use the chrome.documentScan API to discover and retrieve
images from attached paper document scanners.

  * available since Chrome 44
  * https://developer.chrome.com/extensions/documentScan

Use the chrome.downloads API to programmatically initiate,
monitor, manipulate, and search for downloads.

  * available since Chrome 31
  * https://developer.chrome.com/extensions/downloads

  * available since Chrome 27

Use the chrome.enterprise.deviceAttributes API to read device
attributes.
Note: This API is only available to extensions force-installed by enterprise policy.

  * available since Chrome 46
  * https://developer.chrome.com/extensions/enterprise.deviceAttributes

Use the chrome.enterprise.hardwarePlatform API to get the
manufacturer and model of the hardware platform where the browser runs.
Note: This API is only available to extensions installed by enterprise
policy.

  * available since Chrome 71
  * https://developer.chrome.com/extensions/enterprise.hardwarePlatform

Use the chrome.enterprise.platformKeys API to generate
hardware-backed keys and to install certificates for these keys. The
certificates will be managed by the platform and can be used for TLS
authentication, network access or by other extension through
'platformKeys chrome.platformKeys'.

  * available since Chrome 37
  * https://developer.chrome.com/extensions/enterprise.platformKeys

  * available since Chrome 28

Private API for reporting Chrome browser status to admin console.

* available since Chrome 68

The chrome.extension API has utilities that can be used by any extension page. It includes support for exchanging messages
between an extension and its content scripts or between extensions, as described in detail in Message Passing.

  * available since Chrome 27
  * https://developer.chrome.com/extensions/extension

Use the chrome.feedbackPrivate API to provide Chrome [OS]
feedback to the Google Feedback servers.

  * available since Chrome 29

Use the chrome.fileBrowserHandler API to extend the Chrome OS file browser. For example, you can use this API to enable
users to upload files to your website.

  * available since Chrome 27
  * https://developer.chrome.com/extensions/fileBrowserHandler

fileManagerPrivate API.
This is a private API used by the file browser of ChromeOS.

  * available since Chrome 39

Use the chrome.fileSystemProvider API to create file systems,
that can be accessible from the file manager on Chrome OS.

  * available since Chrome 40
  * https://developer.chrome.com/extensions/fileSystemProvider

Use the chrome.fontSettings API to manage Chrome's font settings.

* available since Chrome 27
* https://developer.chrome.com/extensions/fontSettings

Use chrome.gcm to enable apps and extensions to send and receive messages through the Google Cloud Messaging Service.

* available since Chrome 35
* https://developer.chrome.com/extensions/gcm

Use the chrome.history API to interact with the browser's record of visited pages. You can add, remove, and query for URLs
in the browser's history. To override the history page with your own version, see Override Pages.

  * available since Chrome 27
  * https://developer.chrome.com/extensions/history

Use the chrome.i18n infrastructure to implement internationalization across your whole app or extension.

* available since Chrome 27
* https://developer.chrome.com/extensions/i18n

Use the chrome.identity API to get OAuth2 access tokens.

* available since Chrome 29
* https://developer.chrome.com/extensions/identity

Use the chrome.idle API to detect when the machine's idle state changes.

* available since Chrome 27
* https://developer.chrome.com/extensions/idle

An API to test IDL schema specifications.

* available since Chrome master
* https://developer.chrome.com/extensions/idltest

Use the chrome.image_writer API to write images to
removable media.

See the design doc for a detailed description of this API.
https://goo.gl/KzMEFq

  * available since Chrome 31

  * available since Chrome 27

Use the chrome.input.ime API to implement a custom IME for Chrome OS. This allows your extension to handle keystrokes, set
the composition, and manage the candidate window.

  * available since Chrome 27
  * https://developer.chrome.com/extensions/input.ime

Use chrome.instanceID to access the Instance ID service.

* available since Chrome 46
* https://developer.chrome.com/extensions/instanceID

Use the chrome.languageSettingsPrivate API to get or change
language and input method settings.

  * available since Chrome master

The chrome.management API provides ways to manage the list of extensions/apps that are installed and running. It is
particularly useful for extensions that override the built-in New Tab page.

  * available since Chrome 27
  * https://developer.chrome.com/extensions/management

  * available since Chrome 27

  * available since Chrome 59

The chrome.mojoPrivate API provides access to the mojo modules.

* available since Chrome 42

The chrome.networkingPrivate API is used for configuring
network connections (Cellular, Ethernet, VPN, WiFi or WiMAX). This private
API is only valid if called from a browser or app associated with the
primary user. See the Open Network Configuration (ONC) documentation for
descriptions of properties:

src/components/onc/docs/onc_spec.html, or the

Open Network Configuration page at chromium.org.

NOTE: Most dictionary properties and enum values use UpperCamelCase to match
the ONC spec instead of the JavaScript lowerCamelCase convention.

'State' properties describe just the ONC properties returned by
'networkingPrivate.getState' and 'networkingPrivate.getNetworks'.

'Config' properties describe just the ONC properties that can be configured
through this API. NOTE: Not all configuration properties are exposed at this
time, only those currently required by the Chrome Settings UI.
TODO(stevenjb): Provide all configuration properties and types,
crbug.com/380937.

TODO(stevenjb/pneubeck): Merge the ONC documentation with this document and
use it as the ONC specification.

  * available since Chrome 28

Use the networking.config API to authenticate to captive
portals.

  * available since Chrome 43
  * https://developer.chrome.com/extensions/networking.config

Use the chrome.notifications API to create rich notifications
using templates and show these notifications to users in the system tray.

  * available since Chrome 28
  * https://developer.chrome.com/extensions/notifications

The omnibox API allows you to register a keyword with Google Chrome's address bar, which is also known as the omnibox.

* available since Chrome 27
* https://developer.chrome.com/extensions/omnibox

Use the chrome.pageAction API to put icons in the main Google Chrome toolbar, to the right of the address bar. Page
actions represent actions that can be taken on the current page, but that aren't applicable to all pages. Page actions
appear grayed out when inactive.

  * available since Chrome 27
  * https://developer.chrome.com/extensions/pageAction

Use the chrome.pageCapture API to save a tab as MHTML.

* available since Chrome 27
* https://developer.chrome.com/extensions/pageCapture

Use the chrome.passwordsPrivate API to add or remove password
data from the settings UI.

  * available since Chrome master

Use the chrome.permissions API to request declared optional permissions at run time rather than install time, so users
understand why the permissions are needed and grant only those that are necessary.

  * available since Chrome 27
  * https://developer.chrome.com/extensions/permissions

Use the chrome.platformKeys API to access client certificates
managed by the platform. If the user or policy grants the permission, an
extension can use such a certficate in its custom authentication protocol.
E.g. this allows usage of platform managed certificates in third party VPNs
(see 'vpnProvider chrome.vpnProvider').

  * available since Chrome 45
  * https://developer.chrome.com/extensions/platformKeys

Use the chrome.power API to override the system's power
management features.

  * available since Chrome 27
  * https://developer.chrome.com/extensions/power

  * available since Chrome 36

The chrome.printerProvider API exposes events used by print
manager to query printers controlled by extensions, to query their
capabilities and to submit print jobs to these printers.

  * available since Chrome 44
  * https://developer.chrome.com/extensions/printerProvider

Use the chrome.privacy API to control usage of the features in Chrome that can affect a user's privacy. This API relies on
the ChromeSetting prototype of the type API for getting and setting Chrome's configuration.

  * available since Chrome 27
  * https://developer.chrome.com/extensions/privacy

Use the chrome.processes API to interact with the browser's
processes.

  * available since Chrome 72
  * https://developer.chrome.com/extensions/processes

Use the chrome.proxy API to manage Chrome's proxy settings. This API relies on the ChromeSetting prototype of the type API
for getting and setting the proxy configuration.

  * available since Chrome 27
  * https://developer.chrome.com/extensions/proxy

Use the chrome.quickUnlockPrivate API to change whether the
lock screen is enabled and which modes are allowed (active) for unlocking a
Chrome OS device from the lock screen. The API is also used to set quick
unlock credentials.
Note: The API is named 'quickUnlock' for historical reasons but it should be
used for all lock screen settings.
Note: This API can not be used to actually unlock the device.

  * available since Chrome 53

resourcesPrivate.

* available since Chrome 47

Use the chrome.runtime API to retrieve the background page, return details about the manifest, and listen for and respond
to events in the app or extension lifecycle. You can also use this API to convert the relative path of URLs to
fully-qualified URLs.

  * available since Chrome 27
  * https://developer.chrome.com/extensions/runtime

Use the chrome.safeBrowsingPrivate API to observe events.

* available since Chrome 68

Use the chrome.sessions API to query and restore tabs and windows from a browsing session.

* available since Chrome 37
* https://developer.chrome.com/extensions/sessions

Use the chrome.settingsPrivate API to get or set preferences
from the settings UI. Access is restricted to a whitelisted set of user
facing preferences.

  * available since Chrome master

Use the chrome.signedInDevices API to get a list of devices
signed into chrome with the same account as the current profile.

  * available since Chrome 72
  * https://developer.chrome.com/extensions/signedInDevices

Use the chrome.storage API to store, retrieve, and track changes to user data.

* available since Chrome 27
* https://developer.chrome.com/extensions/storage

Manages an app's system indicator icon, an image displayed in the system's
menubar, system tray, or other visible area provided by the OS.
This is modelled after the other extension action APIs, such as
chrome.browserAction and chrome.pageAction.

  * available since Chrome 72
  * https://developer.chrome.com/extensions/systemIndicator

  * available since Chrome 27

Use the system.cpu API to query CPU metadata.

* available since Chrome 32
* https://developer.chrome.com/extensions/system.cpu

Use the system.display API to query display metadata.

* available since Chrome 30
* https://developer.chrome.com/extensions/system.display

The chrome.system.memory API.

* available since Chrome 32
* https://developer.chrome.com/extensions/system.memory

Use the chrome.system.storage API to query storage device
information and be notified when a removable storage device is attached and
detached.

  * available since Chrome 30
  * https://developer.chrome.com/extensions/system.storage

Use the chrome.tabCapture API to interact with tab media
streams.

  * available since Chrome 31
  * https://developer.chrome.com/extensions/tabCapture

Use the chrome.tabs API to interact with the browser's tab system. You can use this API to create, modify, and rearrange
tabs in the browser.

  * available since Chrome 27
  * https://developer.chrome.com/extensions/tabs

  * available since Chrome 27

  * available since Chrome 27
* https://developer.chrome.com/extensions/test

Use the chrome.topSites API to access the top sites that are displayed on the new tab page.

* available since Chrome 27
* https://developer.chrome.com/extensions/topSites

Use the chrome.tts API to play synthesized text-to-speech (TTS). See also the related ttsEngine API, which allows an
extension to implement a speech engine.

  * available since Chrome 27
  * https://developer.chrome.com/extensions/tts

Use the chrome.ttsEngine API to implement a text-to-speech(TTS) engine using an extension. If your extension registers
using this API, it will receive events containing an utterance to be spoken and other parameters when any extension or
Chrome App uses the tts API to generate speech. Your extension can then use any available web technology to synthesize and
output the speech, and send events back to the calling function to report the status.

  * available since Chrome 27
  * https://developer.chrome.com/extensions/ttsEngine

Use the chrome.usersPrivate API to manage users.

* available since Chrome master

  * available since Chrome 31

Use the chrome.vpnProvider API to implement a VPN
client.

  * available since Chrome 43
  * https://developer.chrome.com/extensions/vpnProvider

Use the chrome.wallpaper API to change the ChromeOS wallpaper.

* available since Chrome 31
* https://developer.chrome.com/extensions/wallpaper

Use the chrome.webNavigation API to receive notifications about the status of navigation requests in-flight.

* available since Chrome 27
* https://developer.chrome.com/extensions/webNavigation

Use the chrome.webRequest API to observe and analyze traffic and to intercept, block, or modify requests in-flight.

* available since Chrome 27
* https://developer.chrome.com/extensions/webRequest

Webcam Private API.

* available since Chrome 40

The chrome.webrtcAudioPrivate API allows enumeration
of audio output (sink) devices.

Note that device IDs as used in this API are opaque (i.e. they are
not the hardware identifier of the device) and while they are
unique and persistent across sessions, they are valid only to the
extension calling this API (i.e. they cannot be shared between
extensions).

See http://goo.gl/8rOmgk for further documentation of this API.

  * available since Chrome 32

Use the chrome.webrtcDesktopCapturePrivate API to capture
desktop media requested from a WebView.

  * available since Chrome 44

Use the chrome.webrtcLoggingPrivate API to control diagnostic
WebRTC logging.

  * available since Chrome 32

  * available since Chrome 27

Use the chrome.windows API to interact with browser windows. You can use this API to create, modify, and rearrange windows
in the browser.

  * available since Chrome 27
  * https://developer.chrome.com/extensions/windows