Moesif Origin & CORS Changer

Name: Moesif Origin & CORS Changer
Rating: 3 (12 reviews)
Author: Moesif

By: Moesif

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.

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Features & Capabilities

Moesif Origin & CORS Changer is the Firefox version of the highly popular Chrome extension used by more than 100,000 developers weekly. This tool allows you to send cross-domain requests by overriding the Request Origin and various CORS headers including Access-Control-Allow-Origin, Methods, Headers, Credentials, and Expose-Headers.

Designed for developer testing during development phases, it provides selective enabling based on white-listed domains to ensure security. Moesif's extension facilitates debugging and API development by safely bypassing built-in browser CORS restrictions temporarily. It is highly recommended to disable the plugin after debugging to avoid potential security risks.

Moesif helps API teams improve user-centric analytics, monitor API behaviors, detect threats, and ship better API products. This extension integrates powerful features aligned with Moesif's API monitoring services for seamless development and testing workflows.

For more information on CORS and the extension's capabilities, visit Moesif CORS Guide and learn about their broader API analytics platform at Moesif.

User Growth & Download Statistics

Add-on Developer Tools Programming

By:

Moesif

Daily users:

517 -2

Rating:

3.00

(12)

Version:

0.4.7 Last updated: 2020-08-15

Version code:

5082165

Creation date:

2018-08-03

Risk:

Permissions:

Size:

458.87KB

Email:

su*****@moesif.com

URLs:

Website

Full description:

Source:

Firefox Add-ons Store

Data ingested on:

2026-06-03

Compare stats and ranking:

Ranking

# 4,754 ▼ 36

Other rankings

#30 in exchange keyword 13 ▼ 3

#37 in override keyword 11 ▼ 1

#98 in week keyword 10

#109 in radar keyword 15 ▲ 1

#116 in range keyword 13 ▼ 1

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Contact the developer

Chrome-Stats does not own this Firefox add-on. Please use these information below to contact the Firefox add-on developer.

Developed by:

Moesif

Firefox Add-ons Store

https://addons.mozilla.org/firefox/addon/moesif-origin-cors-changer1/

Email:

su*****@moesif.com

Website:

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

User Reviews

Users praise the add-on for being highly customizable and easy to use, especially for testing and fixing cross-origin issues. It’s also appreciated for porting from Chrome. However, there are recurring concerns about mandatory email/login to unlock advanced settings, privacy/trust issues regarding email use and potential third-party relays, and reported compatibility problems on older Firefox versions.

Pros

Very customizable for testing and fixing cross-origin/CORS issues
Easy to use and generally works as a CORS extension
Effective for cross-origin testing on internal sites
Ported from Chrome store, providing familiarity for users

Cons

Requires login or email to unlock advanced settings
Privacy/trust concerns about providing your email and potential third-party relay
Compatibility issues on certain Firefox versions (e.g., Firefox v86)

Recent reviews

requires login to work

by Mo*****, 2025-12-24

by 远离*****, 2025-04-07

by Jo*****, 2025-02-20

View all user reviews ›

Is Moesif Origin & CORS Changer Safe?

Risk impact

Risk impact measures the level of extra permissions an extension has access to. A low risk impact extension cannot do much harms, whereas a high risk impact extension can do a lot of damage like stealing your password, bypassing your security settings, and accessing your personal data. High risk impact extensions are not necessarily malicious. However, if they do turn malicious, they can be very harmful.

Moesif Origin & CORS Changer requires a few sensitive permissions. Exercise caution before installing.

Risk impact analysis details

Critical Allows access to all websites, posing a significant security risk as it can monitor and modify data from any visited site.
High ****** *** ********* ** ******* *** ******* ******* ** ****** *** *** ******** ******

Risk likelihood

Risk likelihood measures the probability that a Firefox add-on may turn malicious. This is determined by the publisher and the Firefox add-on reputation on Firefox Add-ons Store, the amount of time the Firefox add-on has been around, and other signals about the Firefox add-on. Our algorithms are not perfect, and are subject to change as we discover new ways to detect malicious extensions. We recommend that you always exercise caution when installing a Firefox add-on.

Moesif Origin & CORS Changer is probably trust-worthy. Prefer other publishers if available. Exercise caution when installing this add-on.

Risk likelihood analysis details

High This extension has low user count. Unpopular extensions may not be stable or safe.
Medium **** ********* *** *** **** *******
Low **** ********* *** ******* **** **** * ****** **** ***** ******** *** **** ****** ** ** ****** *** *****
Low **** ********* *** ***** **** **** * ****** **** ***** ********** *** **** ****** ** ** ****** *** *****