Allow CORS: Access-Control-Allow-Origin

Allow CORS: Access-Control-Allow-Origin

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

What is 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.
Merlin
Stats
By: Muyor
Rating: 3.62 (50)
Version: 0.1.7 (Last updated: 2022-07-12)
Creation date: 2018-04-25
Weekly download count: 643
Firefox on Android: Yes
Risk impact: High risk impact
Risk likelihood: Low risk likelihood
Manifest version: 2
Permissions:
  • storage
  • activeTab
  • <all_urls>
  • webRequest
  • webRequestBlocking
Size: 64.77K
URLs: Website
Stats date:

Other platforms

Allow CORS: Access-Control-Allow-Origin
Allow CORS: Access-Control-Allow-Origin (v0.1.9)
3.40 (260) 800,000
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Merlin
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
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
  • Helps with CORS issues during development
  • Successfully bypasses CORS
  • Restored sanity for developers
Cons
  • Whitelist acts as a blacklist, not working as expected
  • Doesn't work as of a certain update (September 2023)
  • Finicky and requires frequent toggling
Most mentioned
  • Whitelist feature not working correctly
  • Intermittently effective; requires off and on toggling
  • Extension solved specific CORS-related problems
Recent reviews
Doesn't really let you control what domains to use or not use CORS on, whitelist acts as a blacklist as opposed to "whitelist". Kind of disappointing how the creator failed to implement a basic feature.
by downloador, 2024-01-17
View all user reviews
Safety
Risk impact

Allow CORS: Access-Control-Allow-Origin 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 Allow CORS: Access-Control-Allow-Origin if you trust the publisher.

Risk likelihood

Allow CORS: Access-Control-Allow-Origin has earned a fairly good reputation and likely can be trusted.

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Screenshots