Kango framework

Kango is an cross-browser extension framework, based on web-standards.
Now everyone developer familiar with JavaScript can create extensions for all major browsers including even Internet Explorer.


Single code base

Write single code which works in the same way on all major browsers: Chrome, Firefox, Internet Explorer, and Safari.

Content scripts

Kango provides full access to DOM and have built-in support for Greasemonkey-style user scripts.

Background scripts

Create long-running scripts to process large data in background.

Third-party libraries support

Use jQuery and hundreds of other JavaScript libraries.


Cross-domain HTTP requests.


Persistent JSON storage.

Browser Management

Handle browser events and interact with the browser tab system.

Browser Button

Dynamic button with badge in browser bar.

HTML Popup

Popup window with any HTML content.


Update extension from your server at any time.


Kango is free for open source non-profitable projects.
To learn more about the commercial license please contact us.


Free license package includes support for Chrome, Firefox and Safari.

Download Kango v1.7.9

What's new in the latest version

Developer information

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