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.
Merlin
Stats
By: spenibus
Rating: 4.20 (105)
Version: 18.11.13.2044resigned1 (Last updated: 2024-04-25)
Creation date: 2015-09-10
Weekly download count: 864
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:

Other platforms

Not available on Chrome
Not available on Edge
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Merlin
Summary

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
See more
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
  • Eliminates CORS issues with a simple click
  • Essential for projects with containers and reverse proxies
  • Works well and reliable as of November 2023
  • Useful for developers
Cons
  • Not working as of September 2023
  • Does not work on localhost with certain Firefox versions (e.g., FF ver 98)
  • Addon does not remove cleanly - issues persist after removal
Most mentioned
  • Solves CORS issues
  • Easy to use
  • Useful for development
  • Does not work for some users
  • Removal problems
Recent reviews
Works in the click of a button, no configuration or rulesets needed
by ohNo, 2024-04-19

I take this tool for granted so I decided to give it the review it deserves. A must have for projects with containers, reverse proxies, etc.
by Patrick Michaelsen, 2024-03-13

I take this tool for granted so I decided to give it the review it deserves. A must have for projects with containers, reverse proxies, etc.
by Patrick Michaelsen, 2024-03-13
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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