Moesif Origin & CORS Changer

The most popular and feature rich CORS tool on Chrome (over 100K weekly active users) is rebuilt for Firefox with more features. This plugin allows you to send cross-domain requests. You can also override Request Origin and CORS headers.
What is Moesif Origin & CORS Changer?
Moesif Origin & CORS Changer is a versatile Firefox add-on widely used by developers. It enables sending of cross-domain requests, overriding of Request Origin and CORS headers. It’s a Firefox adaptation of the widely popular Chrome extension and also allows selective enabling for white-listed domains, adding incredible utility to your browser for managing cross-origin resource sharing (CORS).

Add-on stats

By: Moesif
Users: 907 ▲ 11
Rating: 3.40 (10)
Version: 0.4.7 (Last updated: 2020-08-15)
Creation date: 2018-08-03
Weekly download count: 56
Firefox on Android: No
Risk impact: High risk impact
Risk likelihood: Low risk likelihood
Manifest version: 2
Permissions:
  • webRequest
  • <all_urls>
  • webRequestBlocking
Size: 469.88K
URLs: Website

Other platforms

Not available on Chrome
Not available on Edge
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Add-on summary

This plugin allows you to send cross-domain requests. You can also override Request Origin and CORS headers.

This is the Firefox version of the Moesif CORS extension for Chrome, which is used by over 100,000 developers every week.

You can override the Request Origin header with this plugin and also have Access-Control-Allow-Origin set to *.

Also, you can override: Request Headers: Origin Response Headers: Access-Control-Allow-Origin, Access-Control-Allow-Methods, Access-Control-Allow-Headers, Access-Control-Allow-Credentials, Access-Control-Expose-Headers

You can also selectively enabling for white-listed domains based on target domain of the URL.

Guide on CORS: https://www.moesif.com/blog/technical/cors/Authoritative-Guide-to-CORS-Cross-Origin-Resource-Sharing-for-REST-APIs/

See more

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
  • Customizable
  • Great for fixing cross origin sharing issues
  • Easy to use
Cons
  • Requires email to unlock advanced settings
  • Support broken on Firefox v86
Most mentioned
  • Requires email to unlock advanced settings
  • Ported from Chrome store
  • Works well for testing internal website
Recent reviews
I agree with other recent reviewers. The screenshot shows a lot of fields, but none of them are enabled unless I "Unlock Advanced Settings" (which are in fact any settings) by providing my email. I know I could use a burner email for that, but meh, whatever. Cheers, bye.
by Rimas Kudelis, 2024-03-27

Avoid: requires login to use
by Ed, 2023-04-24
View all user reviews

Add-on safety

Risk impact

Moesif Origin & CORS Changer requires some sensitive permissions that could impact your browser and data security. Exercise caution before installing.

Risk likelihood

Moesif Origin & CORS Changer has earned a fairly good reputation and likely can be trusted.

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