WebRequest Rules Firefox

WebRequest Rules

By: sycxyc
Customize web requests by coding JavaScript yourself.

Features & Capabilities

WebRequest Rules is a powerful Chrome extension that grants developers full control over web requests by allowing them to write custom JavaScript rules. Users can cancel or redirect requests, upgrade to secure connections, supply authentication credentials, and modify both request and response headers. The extension supports advanced features like reading request bodies, modifying response bodies, adjustable rule priorities, and grouping with complex conditions.

Designed for flexibility, it offers customizable templates, supports asyncBlocking, and allows easy import/export of settings. Open source and actively maintained, WebRequest Rules is ideal for developers seeking to customize web traffic behavior precisely and efficiently. It also integrates optionally with the Code Editor extension for a seamless coding experience directly within the browser.

User Growth & Download Statistics

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:
sycxyc
Firefox Add-ons Store
https://addons.mozilla.org/firefox/addon/webrequest-rules/
Website:
https://github.com/ichaoX/ext-webRequest/issues

Permission Change History

2025-12-28: Version 4.5 → 4.6
Add Optional permissions: tabGroups

User Reviews

Criminally underrated add-on with great potential, simply the best in its niche with no real replacements. For example, one fun use I found with it is bypassing "Netflix household" IP checks (the red blocking screen). The rule I set up works something like this: "if POST request with URL web.prod.cloud.netflix.com/graphql contains in its body CLCSInterstitialLolomo + resolutionMode OR contains CLCSInterstitialPlaybackAndPostPlayback, then BLOCK it".
by WA*****, 2026-04-07

by xy*****, 2026-01-05

perfect
by fr*****, 2025-06-27
View all user reviews ›

Is WebRequest Rules 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.

WebRequest Rules requires some sensitive permissions that could impact your browser and data security. Exercise caution before installing.

Risk impact analysis details
  • Critical Grants access to browser tabs, which can be used to track user browsing habits and history, presenting a privacy concern.
  • Critical ****** ****** ** *** ********* ****** * *********** ******** **** ** ** *** ******* *** ****** **** **** *** ******* *****
  • 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.

WebRequest Rules 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.
  • Low **** ********* *** ******* **** **** * ****** **** ***** ******** *** **** ****** ** ** ****** *** *****
  • Low **** ********* *** ***** **** **** * ****** **** ***** ********** *** **** ****** ** ** ****** *** *****
  • Good **** ********* *** **** **** *******
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