Add-ons for Firefox (en-US)

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Extensions are like apps for Firefox.

They add features to Firefox to make browsing faster, safer, or just plain fun.

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Privacy & Security extensions

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Productivity tools

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Recommended extensions

Simple Tab Groups
Create, modify, and quickly change tab groups
Rated 4.1 out of 5
Drive4ik
74,925 users
Tree Style Tab
Show tabs like a tree.
Rated 4.6 out of 5
Piro (piro_or)
191,811 users
Dark Reader
Dark mode for every website. Take care of your eyes, use dark theme for night and daily browsing.
Rated 4.6 out of 5
Alexander Shutau
1,095,106 users
Unhook: Remove YouTube Recommended Videos Comments
Hide YouTube related videos, comments, video suggestions wall, homepage recommendations, trending tab, and other distractions.
Rated 4.8 out of 5
Unhook
58,101 users

Tab managers

Tree Style Tab
Show tabs like a tree.
Rated 4.6 out of 5
Piro (piro_or)
191,811 users
OneTab
OneTab - Too many tabs? Convert tabs to a list and reduce browser memory
Rated 4.2 out of 5
OneTab Team
150,223 users
Simple Tab Groups
Create, modify, and quickly change tab groups
Rated 4.1 out of 5
Drive4ik
74,925 users
Tab Session Manager
Save and restore the state of windows and tabs. It also supports automatic saving and cloud sync.
Rated 4.3 out of 5
sienori
135,360 users

Translation tools

To Google Translate
Right-click a section of text and click the Translate icon next to it to text translate or listen to it in your language.
Rated 4.1 out of 5
Juan Escobar
1,096,675 users
TWP - Translate Web Pages
Translate your page in real time using Google or Yandex. It is not necessary to open new tabs. Now works with the NoScript Extension.
Rated 4.8 out of 5
Filipe Ps
653,177 users
Simple Translate
Quickly translate selected or typed text on web pages. Supports Google Translate and DeepL API.
Rated 4.7 out of 5
sienori
286,901 users
ImTranslator: Translator, Dictionary, TTS
COMPLETELY REDESIGNED TRANSLATOR FOR FIREFOX ImTranslator translates text, words, webpages between more than 100 languages. NEW: Inline Translator, Dictionary, access to Google Translate, Microsoft Translator. Unique on the fly localization.
Rated 4.5 out of 5
ImTranslator
145,047 users

Recommended themes

Nighttime - Bokoblin23
Rated 4.7 out of 5
Bokoblin23
5,725 users
Blue Halloween Night by candelora
Rated 5 out of 5
candelora
678 users
striped colours
Rated 5 out of 5
Leiperd
79 users

Top download managers

Video DownloadHelper
The easy way to download and convert Web videos from hundreds of YouTube-like sites.
Rated 4.3 out of 5
mig
1,972,852 users
Easy Youtube Video Downloader Express
A simple extension for superfast and easy YouTube downloads in FLV, 3GP, MP3, MP4, 720p, and 1080p formats.
Rated 4.2 out of 5
Dishita
591,806 users
DownThemAll!
The Mass Downloader for your browser
Rated 4.2 out of 5
Nils Maier
214,448 users
Turbo Download Manager
A download manager with the ability to pause and resume downloads, download remote files, and more.
Rated 4 out of 5
InBasic
65,019 users

“twitter” tagged extensions

Block Site
A customizable, password-protected website blocker and redirector.
Rated 4 out of 5
Ray
68,539 users
Feedbro
Advanced Feed Reader - Read news & blogs or any RSS/Atom/RDF source.
Rated 4.5 out of 5
Nodetics
47,226 users
Turn Off the Lights for Firefox
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. Dark mode for all websites. It works for all known video sites such as YouTube, Vimeo, Twitch, Dailymotion, Facebook, etc.
Rated 4.6 out of 5
Stefan vd
40,514 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
Rated 4.3 out of 5
code-for-charity
21,445 users