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Welcome What's new in Chrome extensions
Support and feedback Get help with Chrome extensions File a bug Submit a feature request Find and follow a bug
Welcome Extensions 101 Development basics Run scripts on every page Inject scripts into the active tab Manage tabs Handle events with service workers
Welcome to Manifest V3 Extensions platform vision Overview of Manifest V3
What are themes? Frequently asked questions
Migrate to Manifest V3 Manifest V3 migration checklist Update the manifest Migrate to a service worker Update your code Replace blocking web request listeners Improve extension security Publish your extension Manifest V2 support timeline Known issues when migrating to Manifest V3
API reference Samples
Extension development overview Manifest file format Architecture overview Declare permissions About extension service workers Design the user interface Debug extensions
About extension service workers Extension service worker basics The extension service worker lifecycle Events in service workers Use WebSockets in service workers
Message passing Content scripts Match patterns Using promises Cross-origin isolation Storage and cookies
Use eval() in sandboxed iframes
Overriding Chrome settings Extending DevTools Fetching favicons OAuth2: Authenticate users with Google Override Chrome pages Rich notifications API Native messaging Audio recording and screen capture Use geolocation WebHID in extensions WebUSB in extensions File handling on Chrome OS Unit testing Chrome Extensions End-to-end testing for Chrome Extensions Tutorial: Testing Chrome Extensions with Puppeteer
Protect user privacy Permission warning guidelines Stay secure Accessibility (a11y) Localization message formats Give users options
Extension hosting Alternative extension installation methods Installing extensions on Linux Use Google Analytics 4
About Manifest V2 Getting started
What are extensions? What are themes? Frequently asked questions
Extension development overview Manifest file format Architecture overview Declare permissions Design the user interface Debugging extensions Samples
Message passing Content scripts Manage events with background scripts Match patterns Cross-origin isolation
Cross-origin XMLHttpRequest Using eval in Chrome extensions
Overriding Chrome settings Extending DevTools OAuth2: Authenticate users with Google Overriding Chrome pages Rich notifications API
Protect user privacy Declare permissions and warn users Stay secure Accessibility (a11y) Localization message formats Give users options
Chrome Web Store Alternative extension distribution options Installing extensions on Linux Tutorial: Google analytics
Extensions
Welcome What's new in Chrome extensions
Support and feedback Get help with Chrome extensions File a bug Submit a feature request Find and follow a bug
Welcome Extensions 101 Development basics Run scripts on every page Inject scripts into the active tab Manage tabs Handle events with service workers
Welcome to Manifest V3 Extensions platform vision Overview of Manifest V3
What are themes? Frequently asked questions
Migrate to Manifest V3 Manifest V3 migration checklist Update the manifest Migrate to a service worker Update your code Replace blocking web request listeners Improve extension security Publish your extension Manifest V2 support timeline Known issues when migrating to Manifest V3
API reference Samples
Extension development overview Manifest file format Architecture overview Declare permissions About extension service workers Design the user interface Debug extensions
About extension service workers Extension service worker basics The extension service worker lifecycle Events in service workers Use WebSockets in service workers
Message passing Content scripts Match patterns Using promises Cross-origin isolation Storage and cookies
Use eval() in sandboxed iframes
Overriding Chrome settings Extending DevTools Fetching favicons OAuth2: Authenticate users with Google Override Chrome pages Rich notifications API Native messaging Audio recording and screen capture Use geolocation WebHID in extensions WebUSB in extensions File handling on Chrome OS Unit testing Chrome Extensions End-to-end testing for Chrome Extensions Tutorial: Testing Chrome Extensions with Puppeteer
Protect user privacy Permission warning guidelines Stay secure Accessibility (a11y) Localization message formats Give users options
Extension hosting Alternative extension installation methods Installing extensions on Linux Use Google Analytics 4
About Manifest V2 Getting started
What are extensions? What are themes? Frequently asked questions
Extension development overview Manifest file format Architecture overview Declare permissions Design the user interface Debugging extensions Samples
Message passing Content scripts Manage events with background scripts Match patterns Cross-origin isolation
Cross-origin XMLHttpRequest Using eval in Chrome extensions
Overriding Chrome settings Extending DevTools OAuth2: Authenticate users with Google Overriding Chrome pages Rich notifications API
Protect user privacy Declare permissions and warn users Stay secure Accessibility (a11y) Localization message formats Give users options
Chrome Web Store Alternative extension distribution options Installing extensions on Linux Tutorial: Google analytics

Extension development overview

Published on • Updated on

After reading the Getting Started guides and Architecture Overview, use this guide as an outline of extension components and their capabilities in Manifest V3. You are encouraged to explore and expand extension functionality.

Customize the user interface

Action
Control the display of an extension's icon in the toolbar.
Commands
Add keyboard shortcuts that trigger actions.
Menus
Add items to Google Chrome's context menu.
Omnibox
Add keyword functionality to the address bar.
Pages
Create a version of the New Tab, Bookmark, or History page.
Actions
Dynamically display icons in the toolbar.

Build extension utilities

Accessibility
Make an extension accessible to people with disabilities.
Service workers
Detect and react when something interesting happens.
Internationalization
Work with language and locale.
Identity
Get OAuth2 access tokens.
Management
Manage extensions that are installed and running.
Message passing
Communicate from a content script to its parent extension, or vice versa.
Options page
Let users customize an extension.
Permissions
Modify an extension's permissions.
Storage
Store and retrieve data.

Modify and observe the Chrome browser

Bookmarks
Create, organize, and manipulate bookmark behavior.
Browsing data
Remove browsing data from a user's local profile.
Downloads
Programmatically initiate, monitor, manipulate, and search for downloads.
Settings
Manage Chrome's font settings.
History
Interact with the browser's record of visited pages.
Privacy
Control Chrome privacy features.
Proxy
Manage Chrome's proxy settings.
Sessions
Query and restore tabs and windows from a browsing session.
Tabs
Create, modify, and rearrange tabs in the browser.
Top sites
Access users most visited URLs.
Themes
Change the overall appearance of the browser.
Windows
Create, modify, and rearrange windows in the browser.

Modify and observe the web

Active tab
Securely access websites by removing most needs for <all_urls> host permission.
Content settings
Customize websites features such as cookies, JavaScript, and plugins.
Content scripts
Run JavaScript code in the context of web pages.
Cookies
Explore and modify the browser's cookie system.
Cross-origin XMLHttpRequest
Use XMLHttpRequest to send and receive data from remote servers.
Declarative content
Perform actions on the content of a page without requiring permission.
Desktop capture
Capture content of screen, individual windows or tabs.
Page capture
Save a tab's source information as MHTML.
Tab capture
Interact with tab media streams.
Web navigation
Status updates of navigation requests in-flight.
Declarative net request
Provide rules that tell Chrome how to intercept, block, or modify requests in-flight.

Package, deploy, and update

Chrome Web Store
Hosting and updating extensions with the Chrome Web Store.
Other deployment options
Distribute extensions on a designated network or with other software.

Expand Chrome DevTools

Debugger
Instrument network interaction, debug JavaScript, mutate the DOM and CSS.
Devtools
Add features to Chrome Developer Tools.

Updated on • Improve article

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