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paramName
( optional Type array of paramType )
Undocumented.
Description of this parameter from the json schema.

Google Chrome Extensions (Labs)

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What are Google Chrome Extensions?

Extensions are small software programs that can modify and enhance the functionality of Google Chrome. You write them using web technologies such as HTML, JavaScript, and CSS.

Here are some examples of extensions:

Google Mail Checker
Uses a browser action (icon in the toolbar) to display how many unread messages are in your Gmail inbox. Click the icon to go to your inbox.

News Reader
Features a browser action that, when clicked, shows a popup summarizing the top news items.

Subscribe in Feed Reader
Uses a page action (icon in the address bar) and content script (code injected into a web page) to let you subscribe to a feed in the current web page.


To keep up with the latest news on extensions, read the Chromium blog and the Google Chrome blog, and subscribe to the chromium-extensions group.

How do I start?

  1. Follow the Getting Started tutorial
  2. Read the Overview
  3. Write and debug your extension
  4. Submit your extension to the gallery

Featured videos

Technical videos
Developer snapshots (below)