# Corser

> Allows to bypass CORS restrictions per rules basis

Canonical page: [https://chrome-stats.com/d/corser](https://chrome-stats.com/d/corser)

## Overview

- **ID:** `corser`
- **Platform:** Firefox
- **Type:** Firefox add-on
- **Status:** Available
- **Publisher:** Mikhail Vyrtsev
- **Category:** web-development,privacy-security
- **Daily users:** 31
- **Weekly downloads:** 1
- **Rating:** 3.00 / 5 (4 ratings)
- **Version:** 0.0.16resigned1
- **Last updated:** 2024-04-25
- **First published:** 2017-07-31
- **Size:** 18 KB
- **Data as of:** 2026-09-09
- **Store listing:** [Firefox Add-ons Store](https://addons.mozilla.org/firefox/addon/corser/)
- **Website:** [https://github.com/Reeywhaar/corser](https://github.com/Reeywhaar/corser)

## Description

Corser is a powerful Firefox add-on that enables cross-domain requests and iframe embedding for sites that deny CORS or have x-frame-options headers. Use with caution to maintain your security.

## Rankings

- #20,005 — Overall
- #86 — course

## Permissions and access

### Permissions

- `storage`
- `webRequest`
- `webRequestBlocking`
- `<all_urls>`

## Safety

- **Risk impact:** Moderate risk impact
- **Risk likelihood:** Moderate risk likelihood

### Analysis details

- Allows access to all websites, posing a significant security risk as it can monitor and modify data from any visited site.
- This extension has low user count. Unpopular extensions may not be stable or safe.

> Some risk analysis details are omitted from this free response. [Upgrade to view the full analysis](https://chrome-stats.com/pricing).

## Similar extensions and apps

- [Corsify](https://chrome-stats.com/d/corsify) — 1 users, 3.00 / 5
- [CORS Unbound](https://chrome-stats.com/d/cors-unbound) — 20 users
- [I know what I'm doing](https://chrome-stats.com/d/i-know-what-i-m-doing)
- [CORSE](https://chrome-stats.com/d/corseverywhere) — 36 users
- [CORS Unlocker](https://chrome-stats.com/d/cors-unlocker) — 19 users
- [CORS Unblock](https://chrome-stats.com/d/cors-unblock) — 6,333 users, 3.74 / 5
- [Moesif Origin & CORS Changer](https://chrome-stats.com/d/moesif-origin-cors-changer1) — 491 users, 3.00 / 5
- [CORS Everywhere](https://chrome-stats.com/d/cors-everywhere) — 20,852 users, 4.13 / 5
- [Restfox CORS Helper](https://chrome-stats.com/d/restfox-cors-helper) — 172 users, 5.00 / 5
- [Testfully](https://chrome-stats.com/d/testfully) — 3 users
- [Custom CORS Control](https://chrome-stats.com/d/custom-cors-control) — 6 users
- [CORS Everywhere with referer support](https://chrome-stats.com/d/cors-everywhere-referer) — 1 users

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Source: [Chrome-Stats](https://chrome-stats.com/d/corser)