
CORS Unblock - Eliminate CORS Errors in Firefox
Add-on stats
- storage
- <all_urls>
- webRequest
- webRequestBlocking
- declarativeNetRequest
- contextMenus
Ranking
Add-on summary
This extension provides control over XMLHttpRequest and fetch methods by providing custom "access-control-allow-origin" and "access-control-allow-methods" headers to every requests that the browser receives. A user can toggle the extension on and off from the toolbar button. To modify how these headers are altered, use the right-click context menu items. You can customize what method are allowed. The default option is to allow 'GET', 'PUT', 'POST', 'DELETE', 'HEAD', 'OPTIONS', 'PATCH' methods. You can also ask the extension not to overwrite these headers when the server already fills them.
Preview: https://www.youtube.com/watch?v=8berLeTjKDM
Default values: Access-Control-Allow-Origin: request initiator or '' Access-Control-Allow-Methods: 'GET, PUT, POST, DELETE, HEAD, OPTIONS, PATCH, PROPFIND, PROPPATCH, MKCOL, COPY, MOVE, LOCK' Access-Control-Allow-Methods: request initiator or '' Access-Control-Allow-Credentials: 'true' Access-Control-Expose-Headers: request initiator or '*'
To report bugs please use: https://github.com/balvin-perrie/Access-Control-Allow-Origin---Unblock
Change Log:
See moreUser reviews
- Does what it's supposed to do
- Useful for modifying "Access-Control-Expose-Headers"
- Easy to enable/disable with a click
- Works well for frontend development tasks
- Does not work on multiple recent Firefox versions (e.g., FF 86, FF Developer 78)
- Some users report that it causes issues with specific sites (e.g., YouTube)
- Lack of whitelisting options for specific domains like localhost
- Extension stopped working as of September 2023
- Whitelisting feature requested
- Inconsistent functionality across different Firefox versions
User reviews
Add-on safety
Risk impact
CORS Unblock requires some sensitive permissions that could impact your browser and data security. Exercise caution before installing.
Risk impact analysis details
- Critical Allows access to all websites, posing a significant security risk as it can monitor and modify data from any visited site.
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Risk likelihood
CORS Unblock has earned a fairly good reputation and likely can be trusted.
Risk likelihood analysis details
- High This extension has low user count. Unpopular extensions may not be stable or safe.
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