Allow CORS: Access-Control-Allow-Origin

Easily add (Access-Control-Allow-Origin: *) rule to the response header.

Firefox Addon: Allow CORS: Access-Control-Allow-Origin

The 'Allow CORS: Access-Control-Allow-Origin' is a Firefox add-on designed to facilitate cross-domain Ajax requests in web applications. It works by adding (Access-Control-Allow-Origin: *) rule to the response header, a function typically blocked in modern browsers' JavaScript APIs. Upon installation, it remains inactive by default, which can be changed by simply clicking once on its toolbar icon.

Add-on stats

By: Muyor
Version: 0.2.0 (Last updated: 2024-11-04)
Creation date: 2018-04-25
Weekly download count: 477
Firefox on Android: No
Risk impact: High risk impact
Risk likelihood:
Manifest version: 3
Permissions:
  • storage
  • webRequest
  • declarativeNetRequest
Host permissions:
  • <all_urls>
Size: 82.44K
URLs: Website

Other platforms

Allow CORS: Access-Control-Allow-Origin (v0.2.0)
3.37 (279) 800,000
Not available on Android
Allow CORS: Access-Control-Allow-Origin (v0.2.0)
3.70 (6) 148,835
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Add-on summary

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.

User reviews

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
  • It works for enabling CORS access.
  • Helpful for resolving CORS errors.
Cons
  • High CPU and RAM usage.
  • Issues with the whitelist functionality.
  • No longer works as of September 2023.
Most mentioned
  • High CPU usage
  • CORS functionality
  • Whitelisting issues
User reviews

A LOT of CPU usage, removing the addon reduced CPU usage by about 60%
by Nyoob, 2024-12-08

afer long digging on what is constantly eating my CPU resources even without browsing at all, I found it is this addon
View all user reviews

Add-on safety

Risk impact

Allow CORS: Access-Control-Allow-Origin requires some sensitive permissions that could impact your browser and data security. Exercise caution before installing.

Risk likelihood

Allow CORS: Access-Control-Allow-Origin is probably trust-worthy. Prefer other publishers if available. Exercise caution when installing this add-on.

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