Log in
Preview of Web Defuser

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!

You’ll need Firefox to use this extension
Download Firefox
Download file
2
Users
No Reviews
Not rated yet
5
0
4
0
3
0
2
0
1
0
Screenshots
Options UI with defined rules
About this extension
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.
Rate your experience
How are you enjoying Web Defuser?

Star rating saved

No reviews yet
PermissionsLearn more

Required permissions:

  • Access browser tabs
  • Access your data for all websites
More information
Add-on Links
Version
1.1.0
Size
112.55 KB
Last updated
2 days ago (Jun 10, 2025)
Related Categories
License
MIT License
Version History
Tags
Report this add-on
Add to collection
Release notes for 1.1.0
Added more expressive request matching language

Fixed non-uft-8 sites being broken by body modification rules
More extensions by Gear