Item logo image for COOP Header Remover

COOP Header Remover

ExtensionDeveloper Tools17 users
Item media 1 (screenshot) for COOP Header Remover

Overview

Removes Cross-Origin-Opener-Policy headers from all responses.

Unlock Cross-Origin Interactions for Development and Testing Are strict browser security policies blocking your cross-origin workflows? The Cross-Origin-Opener-Policy (COOP) Remover is a lightweight, developer-focused tool designed to automatically strip the Cross-Origin-Opener-Policy header from all HTTP responses.

0 out of 5No ratings

Learn more about results and reviews.

Details

  • Version
    1.0
  • Updated
    December 17, 2025
  • Offered by
    tran_tien
  • Size
    288KiB
  • Languages
    English
  • Developer
    Email
    me@trantien.info
  • Non-trader
    This developer has not identified itself as a trader. For consumers in the European Union, please note that consumer rights do not apply to contracts between you and this developer.

Privacy

Manage extensions and learn how they're being used in your organization
The developer has disclosed that it will not collect or use your data.

This developer declares that your data is

  • Not being sold to third parties, outside of the approved use cases
  • Not being used or transferred for purposes that are unrelated to the item's core functionality
  • Not being used or transferred to determine creditworthiness or for lending purposes

Support

Related

PiP Unblocker

4.4

Clear Permissions-Policy headers to unblock features like Picture-in-Picture.

OpenHeader

5.0

A lightweight open-source extension to modify request and response headers and filter by URL regexes.

Allow CORS: Access-Control-Allow-Origin

3.4

Easily add (Access-Control-Allow-Origin: *) rule to the response header.

Open ModHeader

0.0

Open source tool to modify HTTP request and response headers. No tracking, no telemetry.

Headerly

5.0

Manage and customize HTTP request & response headers with ease. Quickly set, append, or remove headers.

Disable-CSP

3.7

A browser extension to disable http header Content-Security-Policy and html meta Content-Security-Policy

Modify Http Header

3.8

Modify Http Request Or Response Header.

CORS Unblocker

3.0

Temporarily bypass CORS restrictions to streamline development and testing workflows.

CookieKiller — Auto Reject Cookie Popups

0.0

Automatically reject all cookie consent popups. Privacy-first. Open-source. Zero tracking. Never click "Reject All" again.

Framer - Make IFrames possible!

5.0

Drop X-Frame-Options and Content-Security-Policy HTTP response headers for special sites, allowing pages to be embedded as iframes.

Mod Header

5.0

Add, change, or remove HTTP request & response headers. Scope each rule by request URL and by the site making the request.

CORS Unblock

4.1

No more CORS error by appending 'Access-Control-Allow-Origin: *' header to local and remote web requests when enabled

PiP Unblocker

4.4

Clear Permissions-Policy headers to unblock features like Picture-in-Picture.

OpenHeader

5.0

A lightweight open-source extension to modify request and response headers and filter by URL regexes.

Allow CORS: Access-Control-Allow-Origin

3.4

Easily add (Access-Control-Allow-Origin: *) rule to the response header.

Open ModHeader

0.0

Open source tool to modify HTTP request and response headers. No tracking, no telemetry.

Headerly

5.0

Manage and customize HTTP request & response headers with ease. Quickly set, append, or remove headers.

Disable-CSP

3.7

A browser extension to disable http header Content-Security-Policy and html meta Content-Security-Policy

Modify Http Header

3.8

Modify Http Request Or Response Header.

CORS Unblocker

3.0

Temporarily bypass CORS restrictions to streamline development and testing workflows.

Google apps