CORS Everywhere

CORS Everywhere

A firefox addon allowing the user to enable CORS everywhere by altering http responses. Report issues to the repository, with enough information to reproduce the problem: https://github.com/spenibus/cors-everywhere-firefox-addon/issues

  • CORS Everywhere
  • CORS Everywhere
What is CORS Everywhere?
'CORS Everywhere' is a Firefox add-on designed for developers, altering HTTP responses to enable Cross-Origin Resource Sharing (CORS) in all domains. It wisely manipulates HTTP requests to make browsers perceive affirmative server responses, keeping rules for valid HTTP requests intact. Note that this add-on only alters requests and does not disable security features within Firefox. It comes with a simple customizable toggle button to enable or disable the feature.
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Stats
By: spenibus
Rating: 4.21 (107)
Version: 18.11.13.2044resigned1 (Last updated: 2024-04-25)
Creation date: 2015-09-10
Weekly download count: 811
Firefox on Android: No
Risk impact: High risk impact
Risk likelihood: Moderate risk likelihood
Manifest version: 2
Permissions:
  • webRequest
  • webRequestBlocking
  • storage
  • <all_urls>
Size: 18.93K
URLs: Website
Stats date:

Chrome-Stats Rank

# 451
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Not available on Chrome
Not available on Edge
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Repositories GitHub GitLab

This is a firefox addon that allows the user to enable CORS everywhere by altering http responses.

Note

  • It is important to understand that this addon does not actually disable any kind of security within Firefox. It merely alters http requests to make the browser believe the server has answered favorably. This means the http requests have to be valid and follow the CORS rules.
  • This addon is now a WebExtension.
  • Android is untested therefore not officially supported. Android platform support #15
  • In Firefox 74.0, the addon can not operate on local files (using the file:/// protocol). This is apparently fixed in 75.0. Firefox 74.0 #32
Usage
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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
  • Convenient, simple and practical
  • Works in the click of a button, no configuration or rulesets needed
  • Solved CORS issues quickly and effectively
  • Useful for developers working with containers, reverse proxies, etc.
Cons
  • Some users reported it not working for them, especially on localhost
  • One user mentioned it does not work with Firefox ver 98
  • No option to disable or alter CORS requests on certain sites
Most mentioned
  • Convenient, simple and practical
  • Works in the click of a button, no configuration or rulesets needed
  • Does not work for some users, especially on localhost
Recent reviews
Convenient, simple and practical
by Hu, 2024-06-18
by geeknik, 2024-06-12
by geeknik, 2024-06-12
View all user reviews
Safety
Risk impact

CORS Everywhere 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 Everywhere if you trust the publisher.

Risk likelihood

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

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