Welcome to Extensions!
Make Chrome more powerful by customizing the browser to your needs.
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Extend the web
Learn why Extensions are so powerful and how you can customize Chrome's browsing to your needs.
Customize the user interface
Explore a variety of ways to add interactions to your extension.
Modify and observe the browser
Explore ways to customize and react to the browser.
Modify and observe the web
Explore ways to change and modify web pages.
Extensions on YouTube
Insights and news from the Extensions ecosystem.
Whack-a-Mole in your browser - Is it possible!?
Discover how you can build a game in the browser.
Chrome's new extensions menu explained
Learn about the experimental new extensions menu.
Extensions are Neat! Episode 2
Learn how Chrome extensions empower you to customize your browser and boost your productivity.
Extensions in action
Load these sample extensions on your local computer.
Action API demo
This sample demonstrates the use of the Action API which changes the icon, icon badge, hover text or popup page depending on the user's choice or action.
UserScript API demo
A user script can be created by users or downloaded from a script repository. This sample allows you to inject files and arbitrary code added in an options page.
Scripting API demo
This sample demonstrates how you can inject JavaScript into web pages using the Scripting API.
SidePanel API demo
This sample demonstrates how to create a side panel that opens when the user clicks a button on a page or opens a context menu.
Extensions posts
Read the most recent Chrome Extensions blog posts
Support and feedback
Get help developing your extension, and help us make Chrome Extensions better.
Get help with Chrome Extensions
Get answers to questions not covered by the documentation.
File a bug
Report extension bugs or problems with documentation.
Request a feature
Submit a request for a feature that you believe could improve the extension platform.
Find and follow a bug report
Check whether a bug or feature request has already been reported.
Migrate to Manifest V3
Find resources on how to upgrade an extension from Manifest V2 to Manifest V3, the newest version of the Chrome Extensions platform.
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