[ Web Proxy ]
URL:
Viewing: https://developer.mozilla.org/en-US/Add-ons/WebExtensions/Browser_support_for_JavaScript_APIs [Back]  [Original]
Browser support for JavaScript APIs - Mozilla | MDN
HTML

HTML: Markup language

HTML reference
HTML guides
Markup languages
CSS

CSS: Styling language

CSS reference
CSS guides
Layout cookbook
JavaScriptJS

JavaScript: Scripting language

JS reference
JS guides
Web APIs

Web APIs: Programming interfaces

Web API reference
Web API guides
All

All web technology

Technologies
Topics
Learn

Learn web development

Frontend developer course
Learn HTML
Learn CSS
Learn JavaScript
Tools

Discover our tools

About

Get to know MDN better

Blog
Toggle sidebar
  1. Mozilla
  2. Add-ons
  3. Browser extensions
  4. Browser support for JavaScript APIs
Theme
  • OS default
  • Light
  • Dark
English (US)
Remember language Learn more

Browser support for JavaScript APIs

action

In this article

alarms

bookmarks

browserAction

browserSettings

browsingData

captivePortal

clipboard

commands

contentScripts

contextualIdentities

cookies

declarativeNetRequest

devtools

dns

dom

downloads

events

extension

extensionTypes

find

history

i18n

identity

idle

management

notifications

omnibox

pageAction

permissions

pkcs11

privacy

proxy

publicSuffix

runtime

scripting

sessions

sidebarAction

storage

tabGroups

tabs

theme

topSites

types

userScripts

userScripts_legacy

webNavigation

webRequest

windows

See also

Help improve MDN

Was this page helpful to you?
Yes No
Learn how to contribute

This page was last modified on Jul 17, 2025 by MDN contributors.

View this page on GitHub Report a problem with this content
Clear filter input
  1. Browser extensions
  2. Getting started
    1. What are extensions?
    2. Your first extension
    3. Your second extension
    4. Anatomy of an extension
    5. Example extensions
    6. What next?
  3. Concepts
    1. JavaScript APIs
    2. Content scripts
    3. Background scripts
    4. Match patterns
    5. Work with files
    6. Internationalization
    7. Content Security Policy
    8. Native messaging
    9. Native manifests
    10. User actions
    11. Differences between API implementations
    12. Chrome incompatibilities
  4. User interface
    1. Toolbar button
    2. Address bar button
    3. Sidebars
    4. Context menu items
    5. Options page
    6. Extension pages
    7. Notifications
    8. Address bar suggestions
    9. devtools panels
    10. Browser styles
    11. Popups
  5. How to
    1. Intercept HTTP requests
    2. Modify a web page
    3. Insert external content
    4. Share objects with page scripts
    5. Add a button to the toolbar
    6. Implement a settings page
    7. Work with documentId
    8. Work with the Tabs API
    9. Work with the Bookmarks API
    10. Work with the Cookies API
    11. Work with contextual identities
    12. Interact with the clipboard
    13. Use Web Authn API in web extensions
    14. Extend the developer tools
    15. Build a cross-browser extension
  6. JavaScript APIs
    1. Browser support for JavaScript APIs
    2. action
    3. alarms
    4. bookmarks
    5. browserAction
    6. browserSettings
    7. browsingData
    8. captivePortal
    9. clipboard
    10. commands
    11. contentScripts
    12. contextualIdentities
    13. cookies
    14. declarativeNetRequest
    15. devtools
    16. dns
    17. dom
    18. downloads
    19. events
    20. extension
    21. extensionTypes
    22. find
    23. history
    24. i18n
    25. identity
    26. idle
    27. management
    28. menus
    29. notifications
    30. omnibox
    31. pageAction
    32. permissions
    33. pkcs11
    34. privacy
    35. proxy
    36. publicSuffix
    37. runtime
    38. scripting
    39. search
    40. sessions
    41. sidebarAction
    42. storage
    43. tabGroups
    44. tabs
    45. theme
    46. topSites
    47. types
    48. userScripts
    49. userScripts (Legacy)
    50. webNavigation
    51. webRequest
    52. windows
  7. Manifest keys
    1. action
    2. author
    3. background
    4. browser_action
    5. browser_specific_settings
    6. chrome_settings_overrides
    7. chrome_url_overrides
    8. commands
    9. content_scripts
    10. content_security_policy
    11. dark_theme
    12. declarative_net_request
    13. default_locale
    14. description
    15. developer
    16. devtools_page
    17. dictionaries
    18. externally_connectable
    19. homepage_url
    20. host_permissions
    21. icons
    22. incognito
    23. manifest_version
    24. name
    25. omnibox
    26. optional_host_permissions
    27. optional_permissions
    28. options_page
    29. options_ui
    30. page_action
    31. permissions
    32. protocol_handlers
    33. sandbox
    34. short_name
    35. sidebar_action
    36. storage
    37. theme
    38. theme_experiment
    39. user_scripts
    40. version
    41. version_name
    42. web_accessible_resources
  8. Extension Workshop
    1. Develop
    2. Publish
    3. Manage
    4. Enterprise
  9. Contact us
  10. Channels
    1. Add-ons blog
    2. Add-ons forum
    3. Add-ons chat
MDN

Your blueprint for a better internet.

MDN
Contribute
Developers
Mozilla

Portions of this content are 19982026 by individual mozilla.org contributors. Content available under a Creative Commons license.

Web Proxy Viewer  |  New URL  |  Original Page