Add-ons for Firefox (en-US)

RECOMMENDED

DownThemAll!

Mass download manager makes extreme downloading extremely easy.

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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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Essential add-ons

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Declutter your desktop

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Recommended extensions

SteamDB
Adds SteamDB links and new features on the Steam store and community. View lowest game prices and stats.
Rated 4.8 out of 5
SteamDB
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BetterTTV
Enhances Twitch and YouTube with new features, emotes, and more.
Rated 4.6 out of 5
NightDev
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History Cleaner
Deletes browsing history older than a specified number of days.
Rated 4.7 out of 5
Rayquaza01
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SoundFixer
Helps you fix annoying sound problems on sites like YouTube: audio in one channel only, too quiet or too loud. (Unfortunately, this extension does not work on all websites because of cross-domain issues — but it does work on YouTube!)
Rated 4.4 out of 5
Val Packett
43,616 users

Tab managers

Tab Stash
Easily save and organize batches of tabs as bookmarks. Clear your tabs, clear your mind. Only for Firefox.
Rated 4.6 out of 5
Josh Berry
39,785 users
Tree Style Tab
Show tabs like a tree.
Rated 4.5 out of 5
Piro (piro_or)
193,475 users
OneTab
OneTab - Too many tabs? Convert tabs to a list and reduce browser memory
Rated 4.1 out of 5
OneTab Team
159,589 users
Tab Session Manager
Save and restore the state of windows and tabs. It also supports automatic saving and cloud sync.
Rated 4.2 out of 5
sienori
138,759 users

Gaming & media extensions

Enhancer for YouTube™
Take control of YouTube and boost your user experience!
Rated 4.7 out of 5
Maxime RF
648,660 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
Rated 4.8 out of 5
Ajay (SponsorBlock)
600,696 users
Return YouTube Dislike
Returns ability to see dislike statistics on youtube
Rated 4.7 out of 5
Dmitry Selivanov
876,836 users
Read Aloud: A Text to Speech Voice Reader
Read out loud the current web-page article with one click. Supports 40+ languages.
Rated 3.8 out of 5
LSD Software
176,721 users

Recommended themes

Floral Fabric_09
Rated 4.6 out of 5
takapeco
1,062 users
OMGPOP - Default Background
Rated 5 out of 5
poiqzy
37 users
brown-rainbow-Bumblebee
Rated 5 out of 5
Poetician
28 users

“mp3” tagged extensions

Easy Youtube Video Downloader Express
A simple extension for superfast and easy YouTube downloads in FLV, 3GP, MP3, MP4, 720p, and 1080p formats.
Rated 4.1 out of 5
Dishita
453,632 users
600% Sound Volume
Up to 600% volume boost
Rated 4.5 out of 5
Aliaksandr
179,357 users
Global Speed
Set a default speed for video and audio.
Rated 4.7 out of 5
POLYWOCK
58,452 users
YouTube mp3
The YouTube-mp3 Add-on generates a "MP3" button on YouTube. Convert YouTube to mp3 and download the file to your device.
Rated 3.5 out of 5
Addon Developer
32,879 users