Dark Reader
Dark mode for every website. Take care of your eyes, use dark theme for night and daily browsing.
1.286.654 brûkers
Ghostery – Privacy Ad Blocker
Ghostery is een krachtige privacy extensie. Blokkeer ads, stop trackers en maak websites sneller.
1.014.325 brûkers
Stylus
Redesign your favorite websites with Stylus, an actively developed and community driven userstyles manager. Easily install custom themes from popular online repositories, or create, edit, and manage your own personalized CSS stylesheets.
134.242 brûkers
Clear Cache
Advanced cache clearing with time periods, current tab filter, and smart notifications. Perfect for developers and power users. F9 shortcut included!
58.192 brûkers
Chrome Mask
Makes Firefox wear a mask to look like Chrome to websites that block Firefox otherwise.
35.135 brûkers
Tampermonkey
Tampermonkey is the world's most popular userscript manager.
755.596 brûkers
ColorZilla
Advanced Eyedropper, Color Picker, Gradient Generator and other colorful goodies...
142.221 brûkers
Cookie-Editor
Cookie-Editor lets you efficiently create, edit and delete a cookie for the current tab. Perfect for developing, quickly testing or even manually managing your cookies for your privacy.
90.198 brûkers
Ruffle - Flash Emulator
Putting Flash back on the web. Designed to be easy to use, this extension will seamlessly enable you to play flash content, with no extra configuration required!
72.672 brûkers
User-Agent Switcher
Easily override the browser's User-Agent string
63.246 brûkers
Cookie Quick Manager
An addon to manage cookies (view, search, create, edit, remove, backup, restore, protect from deletion and much more). Firefox 57+ is supported.
50.099 brûkers
WhatFont
A wrapper for Chengyin Liu's WhatFont tool
35.424 brûkers
Disable JavaScript
Adds the ability to disable JavaScript for specific sites or specific tabs. You can customize the default JS state (on or off), the disable behavior (by domain or by tab) and much more.
33.690 brûkers
Disable WebRTC
WebRTC leaks your actual IP addresses from behind your VPN, by default.
24.257 brûkers
Google Lighthouse
Lighthouse is an open-source, automated tool for improving the performance, quality, and correctness of your web apps.
15.878 brûkers
My IP Hider VPN
My IP Hider VPN is number one tool for hiding your IP and unblocking any web site! If your Firefox version is less then 55 please install older My IP Hider VPN from "Version History" (https://goo.gl/7ZQQjZ)
14.004 brûkers
RESTED
A REST client for the rest of us
13.828 brûkers
JavaScript Toggle On and Off (WebExtension)
Toggle JavaScript engine on and off the easy way
13.376 brûkers
JSON Lite
Fast JSON viewer - highlights, shows items count/size, handles large files
11.336 brûkers
Empty Cache Button
Cache clearing made easy. One click.
10.963 brûkers
Save Screenshot
Saves the current page as image file or copies it to clipboard.
9.955 brûkers
Proxy Toggle
Toggle between direct connection and a single proxy server via a toolbar icon.
9.814 brûkers
Emoji Cheatsheet
A reference for the codes to generate Emojis on popular sites like GitHub or Basecamp and Unicode characters for Twitter and Facebook. Search Emojis by name or view recently selected items. Emojis are automatically copied to the clipboard.
7.885 brûkers
WebScrapBook
Capture web pages to local device or backend server for future retrieval, organization, annotation, and edit.
7.393 brûkers
Form History Control
Manage form history entries (search, edit, cleanup, export/import) and easy text formfiller. Auto-save text entered in any form while typing to allow fast recovery when disaster strikes.
7.212 brûkers