Allow CORS: Access-Control-Allow-Origin by Muyor
Easily add (Access-Control-Allow-Origin: *) rule to the response header.
9,680 Users9,680 Users
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About this extension
Allow CORS: Access-Control-Allow-Origin lets you easily perform cross-domain Ajax requests in web applications.
Simply activate the add-on and perform the request. CORS or Cross Origin Resource Sharing is blocked in modern browsers by default (in JavaScript APIs). Installing this add-on will allow you to unblock this feature. Please note that, when the add-on is added to your browser, it is in-active by default (toolbar icon is grey C letter). If you want to activate the add-on, please press on the toolbar icon once. The icon will turn to orange C letter.
If you have a feature request, or found a bug to report, please fill the bug report form in the add-on's homepage.
Simply activate the add-on and perform the request. CORS or Cross Origin Resource Sharing is blocked in modern browsers by default (in JavaScript APIs). Installing this add-on will allow you to unblock this feature. Please note that, when the add-on is added to your browser, it is in-active by default (toolbar icon is grey C letter). If you want to activate the add-on, please press on the toolbar icon once. The icon will turn to orange C letter.
If you have a feature request, or found a bug to report, please fill the bug report form in the add-on's homepage.
Rated 2.7 by 94 reviewers
Permissions and data
Required permissions:
- Block content on any page
Optional permissions:
- Access your data for all websites
More information
- Add-on Links
- Version
- 0.2.2
- Size
- 92.8 KB
- Last updated
- 16 days ago (Apr 14, 2026)
- Related Categories
- License
- Mozilla Public License 2.0
- Version History
- Add to collection
The developer of this extension asks that you help support its continued development by making a small contribution.