alarms
Schedule code to run at a specific time in the future. This is like setTimeout() and setInterval(), except that those functions don't work with background pages that are loaded on demand.
| Desktop | Mobile | |||
|---|---|---|---|---|
| Edge: 0/7 | Firefox: 7/7 | Chrome: 7/7 | Opera: 7/7 | Firefox: 7/7 |
bookmarks
Interact with the browser's bookmarking system: bookmark pages, retrieve existing bookmarks, edit, remove, and organize bookmarks.
| Desktop | Mobile | |||
|---|---|---|---|---|
| Edge: 0/23 | Firefox: 14/23 | Chrome: 23/23 | Opera: 23/23 | Firefox: 0/23 |
browserAction
Add a clickable button to the browser's toolbar. You can associated a popup with the button. The popup is specified using HTML, CSS and JavaScript, just like a normal web page. JavaScript running in the popup gets access to all the same WebExtension APIs as your background scripts.
| Desktop | Mobile | |||
|---|---|---|---|---|
| Edge: 0/15 | Firefox: 15/15 | Chrome: 15/15 | Opera: 15/15 | Firefox: 0/15 |
commands
Define commands and bind them to a keyboard shortcut.
contextMenus
Add items to the browser's context menu, to be displayed in the contexts you specify. For example, you can show the item only when the user clicks on an image, or on an editable element, or when part of a page is selected.
| Desktop | Mobile | |||
|---|---|---|---|---|
| Edge: 0/9 | Firefox: 9/9 | Chrome: 9/9 | Opera: 9/9 | Firefox: 0/9 |
cookies
Get and set cookies, and be notified when they change.
| Desktop | Mobile | |||
|---|---|---|---|---|
| Edge: 0/9 | Firefox: 9/9 | Chrome: 9/9 | Opera: 9/9 | Firefox: 9/9 |
downloads
Interact with the browser's download manager. You can use this module to download files, cancel, pause, resume downloads, and show downloaded files in the file manager.
| Desktop | Mobile | |||
|---|---|---|---|---|
| Edge: 0/27 | Firefox: 23/27 | Chrome: 27/27 | Opera: 27/27 | Firefox: 23/27 |
events
Common types used by APIs that dispatch events.
| Desktop | Mobile | |||
|---|---|---|---|---|
| Edge: 0/3 | Firefox: 0/3 | Chrome: 3/3 | Opera: 3/3 | Firefox: 0/3 |
extension
Utilities related to your add-on. Get URLs to resources packages with your add-on, get the Window object for your add-on's pages, get the values for various settings. Note that the messaging APIs in this module are deprecated in favor of the equivalent APIs in the runtime module.
| Desktop | Mobile | |||
|---|---|---|---|---|
| Edge: 0/13 | Firefox: 7/13 | Chrome: 13/13 | Opera: 11/13 | Firefox: 7/13 |
extensionTypes
Some common types used in other WebExtension APIs.
| Desktop | Mobile | |||
|---|---|---|---|---|
| Edge: 0/4 | Firefox: 4/4 | Chrome: 4/4 | Opera: 3/4 | Firefox: 4/4 |
i18n
Functions to internationalize your add-on. You can use these APIs to get localized strings from locale files packaged with your add-on, find out the browser's current language, and find out the value of its Accept-Language header.
| Desktop | Mobile | |||
|---|---|---|---|---|
| Edge: 0/5 | Firefox: 5/5 | Chrome: 5/5 | Opera: 4/5 | Firefox: 5/5 |
idle
Find out when the user's system is idle, locked, or active.
| Desktop | Mobile | |||
|---|---|---|---|---|
| Edge: 0/4 | Firefox: 2/4 | Chrome: 4/4 | Opera: 4/4 | Firefox: 1/4 |
notifications
Display notifications to the user, using the underlying operating system's notification mechanism. Because this API uses the operating system's notification mechanism, the details of how notifications appear and behave may differ according to the operating system and the user's settings.
| Desktop | Mobile | |||
|---|---|---|---|---|
| Edge: 0/9 | Firefox: 8/9 | Chrome: 9/9 | Opera: 9/9 | Firefox: 8/9 |
pageAction
A page action is shown as a clickable icon inside the browser's address bar. You can listen for clicks on the icon, or can specify a popup that will open when the icon is clicked. Page actions are for actions that are only relevant to particular pages. If your icon should always be available, use a browser action instead.
| Desktop | Mobile | |||
|---|---|---|---|---|
| Edge: 0/9 | Firefox: 9/9 | Chrome: 9/9 | Opera: 9/9 | Firefox: 0/9 |
runtime
This module provides information about your add-on and the environment it's running in. It also provides messaging APIs enabling you to: communicate between different parts of your add-on, communicate with other add-ons, and communicate with native applications.
| Desktop | Mobile | |||
|---|---|---|---|---|
| Edge: 0/36 | Firefox: 21/36 | Chrome: 36/36 | Opera: 36/36 | Firefox: 21/36 |
storage
Enables WebExtensions to store and retrieve data, and listen for changes to stored items.
| Desktop | Mobile | |||
|---|---|---|---|---|
| Edge: 0/11 | Firefox: 9/11 | Chrome: 11/11 | Opera: 9/11 | Firefox: 9/11 |
tabs
Interact with the browser's tab system. You can use this API to get a list of opened tabs and to create, modify, and rearrange tabs in the browser.
| Desktop | Mobile | |||
|---|---|---|---|---|
| Edge: 0/45 | Firefox: 40/45 | Chrome: 45/45 | Opera: 37/45 | Firefox: 0/45 |
webNavigation
Get notifications about the various stages of a navigation event.
| Desktop | Mobile | |||
|---|---|---|---|---|
| Edge: 0/13 | Firefox: 11/13 | Chrome: 13/13 | Opera: 13/13 | Firefox: 11/13 |
webRequest
Add event listeners for the various stages of making an HTTP request. The event listener receives detailed information about the request, and can modify or cancel the request.
| Desktop | Mobile | |||
|---|---|---|---|---|
| Edge: 0/16 | Firefox: 15/16 | Chrome: 16/16 | Opera: 16/16 | Firefox: 15/16 |
windows
Interact with browser windows. You can use this API to get information about open windows, to open modify, and close windows. You can also listen for window open, close, and activate events.
| Desktop | Mobile | |||
|---|---|---|---|---|
| Edge: 0/16 | Firefox: 16/16 | Chrome: 16/16 | Opera: 16/16 | Firefox: 0/16 |
