Web Defuser Firefox

Web Defuser

By: Gear
Userscripts/styles on steroids. Keep YouTube or Instagram playing in the background, remove annoying nagging popups, add dark mode to websites, increase video volume past 100% and more!

Features & Capabilities

This extension's goal is to put control over web experience back into the hands of the user above all else. If you've ever been frustrated by some annoying website behavior or missing functionality, this extension will empower you to overcome that.

To achieve that, you can define rules to process any HTTP request as you see fit, including modifying headers, body and more.

Please check out the source code repository (with snippets section containing some example useful rules) and interactive documentation on rules.

User Growth & Download Statistics

Manifest V2 Add-on
By:
Gear
Daily users:
7
Rating:
5.00
(1)
Version:
1.1.0 Last updated: 2025-06-10
Version code:
5966710
Creation date:
2025-03-11
Risk:
High risk impact Moderate risk likelihood
Permissions:
Size:
112.55KB
Full description:
See detailed description
Source:
Firefox Add-ons Store
Data ingested on:
2026-07-05
Compare stats and ranking:

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:
Gear
Firefox Add-ons Store
https://addons.mozilla.org/firefox/addon/web-defuser/

Is Web Defuser 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.

Web Defuser requires some sensitive permissions that could impact your browser and data security. 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.
  • 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.

Web Defuser 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 **** ********* *** **** **** *******
Extension Guard
Extension Guard

Discover every extension in use, analyze risks, and enforce blocking policies with Extension Guard

Secure Your Browser
Upgrade to see full risk analysis details

Best Web Defuser Alternatives

Here are some Firefox add-ons that are similar to Web Defuser: