CORS Unblock

CORS Unblock

No more CORS error by appending 'Access-Control-Allow-Origin: *' header to local and remote web requests when enabled

What is CORS Unblock?
"CORS Unblock" is a Firefox extension offering control over XMLHttpRequest and fetch methods. It appends custom 'access-control-allow-origin' and 'access-control-allow-methods' headers to every browser request, resolving CORS (Cross Origin Resource Sharing) errors. Its features include toggling on/off from the toolbar, customizing allowed methods, and options to not overwrite server-filled headers. Supports WEBDAV methods.
Merlin
Stats
By: Balvin
Rating: 3.72 (25)
Version: 0.3.8 (Last updated: 2024-02-11)
Creation date: 2019-01-22
Weekly download count: 381
Firefox on Android: No
Risk impact: High risk impact
Risk likelihood: Moderate risk likelihood
Manifest version: 2
Permissions:
  • storage
  • <all_urls>
  • webRequest
  • webRequestBlocking
  • declarativeNetRequest
  • contextMenus
Size: 211.30K
URLs: Website
Stats date:

Other platforms

CORS Unblock
CORS Unblock (v0.3.8)
4.18 (144) 200,000
Not available on Edge
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Merlin
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:

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User reviews
User reviews summary
These summaries are automatically generated weekly using AI based on recent user reviews. Firefox Browser Add-ons does not verify user reviews, so some user reviews may be inaccurate, spammy, or outdated.
Pros
  • Works well on certain versions of Firefox
  • Provides a solution for CORS issues
  • Easy to enable/disable with just a click on the icon
Cons
  • Does not work on newer versions of Firefox
  • Some sites work incorrectly when the extension is enabled
Most mentioned
  • Does not work
  • Works well on certain versions of Firefox
  • Easy to enable/disable with just a click on the icon
Recent reviews
by jinijiro, 2024-04-09

by jinijiro, 2024-04-09

by jinijiro, 2024-04-09
View all user reviews
Safety
Risk impact

CORS Unblock is risky to use as it requires a number of sensitive permissions that can potentially harm your browser and steal your data. Exercise caution when installing this add-on. Review carefully before installing. We recommend that you only install CORS Unblock if you trust the publisher.

Risk likelihood

CORS Unblock is probably trust-worthy. Prefer other publishers if available. Exercise caution when installing this add-on.

Upgrade to see risk analysis details
Screenshots