Dark Reader
Mörkt läge på alla webbplatser. Ta hand om dina ögon och använd ett mörkt tema för att surfa på natten och dagen.
1 292 323 användare
Ghostery – Privacy Ad Blocker
The best privacy tool and ad blocker extension for Firefox. Stop trackers, speed up websites and block ads everywhere including YouTube and Facebook.
1 021 110 användare
Stylus
Style:a om webben med Stylus, en användarstils-hanterare. Stylus låter dig enkelt installera teman och skal för många populära sidor.
135 391 användare
Clear Cache
Advanced cache clearing with time periods, current tab filter, and smart notifications. Perfect for developers and power users. F9 shortcut included!
58 144 användare
Chrome Mask
Makes Firefox wear a mask to look like Chrome to websites that block Firefox otherwise.
22 181 användare
Tampermonkey
Tampermonkey is the world's most popular userscript manager.
788 480 användare
ColorZilla
Advanced Eyedropper, Color Picker, Gradient Generator and other colorful goodies...
142 285 användare
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.
90 424 användare
Ruffle
Återställer Flash på webben, där det hör hemma.
72 659 användare
User-Agent Switcher
Easily override the browser's User-Agent string
64 106 användare
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.
50 761 användare
WhatFont
A wrapper for Chengyin Liu's WhatFont tool
35 662 användare
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.
33 970 användare
Disable WebRTC
WebRTC leaks your actual IP addresses from behind your VPN, by default.
24 893 användare
Google Lighthouse
Lighthouse is an open-source, automated tool for improving the performance, quality, and correctness of your web apps.
15 893 användare
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)
14 329 användare
RESTED
A REST client for the rest of us
13 881 användare
JavaScript Toggle On and Off (WebExtension)
Toggle JavaScript engine on and off the easy way
13 349 användare
JSON Lite
Fast JSON viewer - highlights, shows items count/size, handles large files
11 754 användare
Empty Cache Button
Cache clearing made easy. One click.
10 926 användare
Save Screenshot
Saves the current page as image file or copies it to clipboard.
9 887 användare
Proxy Toggle
Toggle between direct connection and a single proxy server via a toolbar icon.
9 878 användare
ScriptCat
Everything can be scripted, allowing your browser to do more!
9 141 användare
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.
8 022 användare
WebScrapBook
Capture web pages to local device or backend server for future retrieval, organization, annotation, and edit.
7 517 användare