Add-ons for Firefox (en-US)

RECOMMENDED

Sidebery

Tabs and bookmarks neatly organized in a Firefox side view.

Get the extension

Extensions are like apps for Firefox.

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

See all extensions

Privacy & Security extensions

See staff picks

Essential add-ons

See staff picks

Declutter your desktop

See staff picks

Recommended extensions

Foxy Gestures
Mouse gestures for Firefox. A web extension alternative to FireGestures created by a long time FireGestures user.
Rated 4.2 out of 5
liebs
19,600 users
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.
Rated 4.7 out of 5
Stylus Team
124,037 users
Weather Extension
The best way to see the weather right in your browser. Easier than looking outside!
Rated 4.4 out of 5
Tim
21,709 users
New Tab Override
New Tab Override allows you to set the page that shows whenever you open a new tab.
Rated 4.4 out of 5
Sören Hentzschel
61,211 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
37,454 users
Tree Style Tab
Show tabs like a tree.
Rated 4.5 out of 5
Piro (piro_or)
197,725 users
OneTab
OneTab - Too many tabs? Convert tabs to a list and reduce browser memory
Rated 4.1 out of 5
OneTab Team
162,297 users
Tabliss - New Tab
A beautiful New Tab page with many customisable backgrounds and widgets that does not require any permissions.
Rated 4.6 out of 5
tabliss.io
77,165 users

Gaming & media extensions

Enhancer for YouTube™
Take control of YouTube and boost your user experience!
Rated 4.7 out of 5
Maxime RF
652,807 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)
613,820 users
Return YouTube Dislike
Returns ability to see dislike statistics on youtube
Rated 4.7 out of 5
Dmitry Selivanov
882,053 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
185,795 users

Recommended themes

Just Grass Sky and Clouds
Rated 4.7 out of 5
bailiee
651 users
златни рибки
Rated 5 out of 5
rositza
228 users
Nuances bleues - Shades of blue
Rated 4.2 out of 5
Dianen
1,621 users

“video downloader” tagged extensions

Video DownloadHelper
Download videos from the web. Easy, smart, no tracking.
Rated 4.3 out of 5
Paul
1,810,165 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 4.1 out of 5
Dishita
467,914 users
Download Video and Flash - HD Download
Download Video and Flash - HD Download is a great download helper tool that lets you download video and Flash games very easily. Download from YouTube, Facebook, Dailymotion, Vimeo and more. Download and enjoy! Download now!
Rated 3.7 out of 5
Download Flash and Video Team
58,675 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
33,525 users