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/apps/accessibilityFeatures

  * available since Chrome 36

  * available since Chrome 29

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/apps/alarms

Use the chrome.app.runtime API to manage the app lifecycle.
The app runtime manages app installation, controls the event page, and can
shut down the app at anytime.

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

Use the chrome.app.window API to create windows. Windows
have an optional frame with title bar and size controls. They are not
associated with any Chrome browser windows. See the 
Window State Sample for a demonstration of these options.

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

Use the appview tag to embed other Chrome Apps within your
Chrome App. (see Usage).

  * available since Chrome 43
  * https://developer.chrome.com/apps/tags/appview

The chrome.audio API is provided to allow users to
get information about and control the audio devices attached to the
system. This API is currently only implemented for ChromeOS.

  * available since Chrome 59
  * https://developer.chrome.com/apps/audio

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/apps/automation

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

  * available since Chrome 37
  * https://developer.chrome.com/apps/bluetooth

The chrome.bluetoothLowEnergy API is used to communicate with
Bluetooth Smart (Low Energy) devices using the

Generic Attribute Profile (GATT).

  * available since Chrome 37
  * https://developer.chrome.com/apps/bluetoothLowEnergy

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

Use the chrome.bluetoothSocket API to send and receive data
to Bluetooth devices using RFCOMM and L2CAP connections.

  * available since Chrome 37
  * https://developer.chrome.com/apps/bluetoothSocket

  * 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/apps/bookmarks

Braille display access private API.

* available since Chrome 31

Use the chrome.browser API to interact with the Chrome browser
associated with the current application and Chrome profile.

  * available since Chrome 42
  * https://developer.chrome.com/apps/browser

Private API for HDMI CEC functionality.

* available since Chrome 68

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/apps/certificateProvider

  * available since Chrome 27

The chrome.clipboard API is provided to allow users to
access data of the clipboard. This is a temporary solution for
chromeos platform apps until open-web alternative is available. It will be
deprecated once open-web solution is available, which could be in 2017 Q4.

  * available since Chrome 72
  * https://developer.chrome.com/apps/clipboard

  * 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 35
  * https://developer.chrome.com/apps/commands

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/apps/contextMenus

  * available since Chrome 46

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

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

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

  * available since Chrome 31

Use the chrome.diagnostics API to query various properties of
the environment that may be useful for diagnostics.

  * available since Chrome 72
  * https://developer.chrome.com/apps/diagnostics

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

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

Use the chrome.dns API for dns resolution.

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

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

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

chrome.easyUnlockPrivate API that provides hooks to Chrome to
be used by Easy Unlock component app.

  * available since Chrome 38

  * 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/apps/enterprise.deviceAttributes

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/apps/enterprise.platformKeys

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/apps/fileBrowserHandler

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

  * available since Chrome 39

Use the chrome.fileSystem API to create, read, navigate,
and write to the user's local file system. With this API, Chrome Apps can
read and write to a user-selected location. For example, a text editor app
can use the API to read and write local documents. All failures are notified
via chrome.runtime.lastError.

  * available since Chrome 27
  * https://developer.chrome.com/apps/fileSystem

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/apps/fileSystemProvider

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/apps/gcm

Use the chrome.hid API to interact with connected HID devices.
This API provides access to HID operations from within the context of an app.
Using this API, apps can function as drivers for hardware devices.

Errors generated by this API are reported by setting
'runtime.lastError' and executing the function's regular callback. The
callback's regular parameters will be undefined in this case.

  * available since Chrome 38
  * https://developer.chrome.com/apps/hid

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

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

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

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

identityPrivate.

* available since Chrome 29

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

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

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 chrome.instanceID to access the Instance ID service.

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

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

  * available since Chrome master

When the user session is locked, the API usage will only be allowed
from the lock screen context.


When the user session is not locked, the API usage will only be
allowed outside the lock screen context - i.e. from the regular app
context.

The API that can be used by an app to create and manage data on the
Chrome OS lock screen.

The API usability will depend on the user session state:

  
    When the user session is locked, the API usage will only be allowed
    from the lock screen context.
  
  
    When the user session is not locked, the API usage will only be
    allowed outside the lock screen context - i.e. from the regular app
    context.
  


Note that apps have reduced access to Chrome apps APIs from the lock screen
context.

* available since Chrome 72
* https://developer.chrome.com/apps/lockScreen.data

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/apps/management

Use the chrome.mdns API to discover services over mDNS.
This comprises a subset of the features of the NSD spec:
http://www.w3.org/TR/discovery-api/

  * available since Chrome 31
  * https://developer.chrome.com/apps/mdns

Use the chrome.mediaGalleries API to access media files (audio,
images, video) from the user's local disks (with the user's consent).

  * available since Chrome 27
  * https://developer.chrome.com/apps/mediaGalleries

Private API for receiving real-time media perception information.

* available since Chrome 60

  * available since Chrome 27

  * available since Chrome 59

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

* available since Chrome 42

musicManagerPrivate.

* available since Chrome 29

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 27

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

  * available since Chrome 42
  * https://developer.chrome.com/apps/networking.config

The chrome.networking.onc API is used for configuring
network connections (Cellular, Ethernet, VPN, WiFi or WiMAX).
This API is available in Chrome OS kiosk sessions.

Network connection configurations are specified following

Open Network Configuration (ONC) specification.

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

* available since Chrome 59
* https://developer.chrome.com/apps/networking.onc

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/apps/notifications

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/apps/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/apps/platformKeys

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

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

  * available since Chrome 29

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/apps/printerProvider

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/apps/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/apps/runtime

Use the chrome.serial API to read from and write to a device
connected to a serial port.

  * available since Chrome 27
  * https://developer.chrome.com/apps/serial

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/apps/signedInDevices

Use the chrome.socket API to send and receive data over the
network using TCP and UDP connections. Note: Starting with Chrome 33,
this API is deprecated in favor of the 'sockets.udp', 'sockets.tcp' and
'sockets.tcpServer' APIs.

  * available since Chrome 27
  * https://developer.chrome.com/apps/socket

Use the chrome.sockets.tcp API to send and receive data over the
network using TCP connections. This API supersedes the TCP functionality
previously found in the chrome.socket API.

  * available since Chrome 33
  * https://developer.chrome.com/apps/sockets.tcp

Use the chrome.sockets.tcpServer API to create server
applications using TCP connections. This API supersedes the TCP functionality
previously found in the chrome.socket API.

  * available since Chrome 33
  * https://developer.chrome.com/apps/sockets.tcpServer

Use the chrome.sockets.udp API to send and receive data over the
network using UDP connections. This API supersedes the UDP functionality
previously found in the 'socket' API.

  * available since Chrome 33
  * https://developer.chrome.com/apps/sockets.udp

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

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

Use the chrome.syncFileSystem API to save and synchronize data
on Google Drive. This API is NOT for accessing arbitrary user docs stored in
Google Drive. It provides app-specific syncable storage for offline and
caching usage so that the same data can be available across different
clients. Read Manage Data for more on using
this API.

  * available since Chrome 27
  * https://developer.chrome.com/apps/syncFileSystem

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/apps/systemIndicator

  * available since Chrome 27

Use the system.cpu API to query CPU metadata.

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

Use the system.display API to query display metadata.

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

The chrome.system.memory API.

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

Use the chrome.system.network API.

* available since Chrome 33
* https://developer.chrome.com/apps/system.network

The chrome.system.powerSource API allows Chrome Kiosk Apps to
query the state of connected power sources.

  * available since Chrome 69
  * https://developer.chrome.com/apps/system.powerSource

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/apps/system.storage

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/apps/tabs

  * available since Chrome 27

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

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/apps/tts

Use the chrome.usb API to interact with connected USB
devices. This API provides access to USB operations from within the context
of an app. Using this API, apps can function as drivers for hardware devices.

Errors generated by this API are reported by setting
'runtime.lastError' and executing the function's regular callback. The
callback's regular parameters will be undefined in this case.

  * available since Chrome 27
  * https://developer.chrome.com/apps/usb

Use the chrome.usersPrivate API to manage users.

* available since Chrome master

The chrome.virtualKeyboard API is a kiosk only API used to
configure virtual keyboard layout and behavior in kiosk sessions.

  * available since Chrome 58
  * https://developer.chrome.com/apps/virtualKeyboard

  * available since Chrome 31

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

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

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

* available since Chrome 43
* https://developer.chrome.com/apps/wallpaper

  * available since Chrome 27

Webcam Private API.

* available since Chrome 40

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

  * available since Chrome 32

webstoreWidgetPrivate API.
This is a private API used to install apps via Chrome Web Store widget - for
example in Files app to install file system provider services.

  * available since Chrome 44

Use the webview tag to actively load live content from the web over the network and embed it in your Chrome App. Your app
can control the appearance of the webview and interact with the web content, initiate navigations in an embedded web page,
react to error events that happen within it, and more (see Usage).

  * available since Chrome 32
  * https://developer.chrome.com/apps/tags/webview

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/apps/windows