Allows to bypass CORS restrictions per rules basis

Corser promo image
What is Corser?

Corser is a Firefox add-on by Mikhail Vyrtsev. This add-on has 19 daily active users and an average user rating of 3.67. The latest version, 0.0.15, was updated 5 years ago.

Stats date:
Users: 19 ▼ -2
Rating: 3.67 (3)
Version: 0.0.15 (Last updated: 2018-12-01)
Creation date: 2017-07-31
Weekly download count: 2
Firefox on Android: No
Manifest version: 2
  • storage
  • webRequest
  • webRequestBlocking
  • <all_urls>
Size: 15.53K
Email: Click to see
URLs: Website
Risk impact: High risk impact
Risk likelihood: Low risk likelihood

Other platforms

Not available on Chrome
Not available on Edge
Corser WebExtension makes it possible to:
  • allows cross-domain request with sites which deny CORS in their headers
  • allows embedding iframe of domain which restricts it by x-frame-options header
Use of this extension is intended for people who understand what they want to achieve. Otherwise it may compromise your security.
User reviews
by sheddup, 2017-12-02

Thanks for this WebExt. ;-)
by miko007, 2017-08-12
View all user reviews
Risk impact

Corser requires a number of risky 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 Corser if you trust the publisher.

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, bypass your security settings, and access your personal data. High risk impact extensions are not necessarily malicious. However, if they do turn malicious, they can be very harmful.

Risk likelihood

Corser has earned a fairly good reputation and likely can be trusted.

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 Browser Add-ons, 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, especially ones with higher risk impact and/or higher risk likelihood.

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