Dark Reader
Dark mode for every website. Take care of your eyes, use dark theme for night and daily browsing.
1,178,273 users
SponsorBlock - Skip Sponsorships on YouTube
Easily skip YouTube video sponsors. When you visit a YouTube video, the extension will check the database for reported sponsors and automatically skip known sponsors. You can also report sponsors in videos. Other browsers: https://sponsor.ajay.app
443,428 users
Search by Image
A powerful reverse image search tool, with support for various search engines, such as Google, Bing, Yandex, Baidu and TinEye.
317,883 users
Read Aloud: A Text to Speech Voice Reader
Read out loud the current web-page article with one click. Supports 40+ languages.
148,616 users
Stylus
Redesign your favourite websites with Stylus, an actively developed and community driven user-style manager. Easily install custom themes from popular online repositories, or create, edit, and manage your own personalised CSS stylesheets.
112,770 users
Unhook: Remove YouTube Recommended Videos Comments
Hide YouTube related videos, comments, video suggestions wall, homepage recommendations, trending tab, and other distractions.
76,162 users
Turn Off the Lights for YouTube™
The entire page will be fading to dark, so you can watch the video as if you were in the cinema.The entire page will be fading to dark, so you can watch the videos as if you were in the cinema. Works for YouTube™ and Beyond.
43,383 users
Dark Background and Light Text
Make every web page (or just the pages you want) display light text on dark backgrounds. All color variations are fully customizable.
40,854 users
Tranquility Reader
Tranquility Reader improves the readability of web articles by removing unnecessary elements like ads, images, social sharing widgets, and other distracting fluff.
37,724 users
'Improve YouTube!' 🎧 (For YouTube & Video)
Youtube Extension. Powerful but lightweight. Enrich your Youtube & content selection. Make YouTube tidy&smart! Layout Filters Shortcuts Adblocker Playlist
33,117 users
Forecastfox (fix version)
Get international weather updates (via AccuWeather.com) displayed right in Firefox with this highly customizable extension.
18,567 users
Tampermonkey
Tampermonkey is the world's most popular userscript manager.
706,758 users
I don't care about cookies
Get rid of cookie warnings from almost all websites!
332,203 users
Reddit Enhancement Suite
Reddit Enhancement Suite (RES) is a suite of tools to enhance your Reddit browsing experience.
278,949 users
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.
63,400 users
I still don't care about cookies
Community version of the popular extension "I don't care about cookies" https://github.com/OhMyGuus/I-Dont-Care-About-Cookies
62,703 users
Old Reddit Redirect
Ensure Reddit always loads the old design
56,421 users
Adblock for Youtube™
Popular Adblock for Youtube™ Extension: Removes the video ads from Youtube™. Thanks to all AdBlock supporters!
50,075 users
Immersive Translate - Translate Website & PDF
Free Translate Website, Translate PDF & Epub eBook, Translate Video Subtitles in Bilingual
42,656 users
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.
37,674 users
Offline QR Code Generator
This add-on allows you to quickly generate a QR code offline with the URL of the open tab or any (selected) other text! 👍 It works completely offline protecting your privacy and has a big range of features like colored QR codes!
20,444 users
DeArrow - Better Titles and Thumbnails on YouTube
Crowdsourcing titles and thumbnails to be descriptive and not sensational
15,945 users
JSON Lite
Fast JSON viewer - highlights, shows items count/size, handles large files
15,178 users
Tab Mix - Links
Tab browsing with an added boost.
13,180 users
Google™ Translator
a handy multi-language translator built on top of Google translate.
12,398 users