Sidebery
Vertical tabs tree and bookmarks in sidebar with advanced containers configuration, grouping and many other features.
76,486 users
uBlock Origin
Finally, an efficient wide-spectrum content blocker. Easy on CPU and memory.
7,950,225 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.
110,299 users
Measure-it
Draw a ruler across any webpage to check the width, height, or alignment of page elements in pixels.
27,563 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
33,729 users
History Cleaner
Deletes browsing history older than a specified number of days.
16,176 users
Privacy Badger
Automatically learns to block invisible trackers.
1,230,523 users
GIPHY for Firefox
Bring the power of a GIF search engine anywhere on the web. Respond to emails, tweets and more with GIFs quickly and easily. Add GIPHY GIFs to your Gmail, Facebook, Twitter and more. Just search, drag and drop or right click!
7,640 users
Swift Selection Search
Swiftly access your search engines in a popup panel when you select text in a webpage. Context menu also included!
11,315 users
Enhancer for YouTube™
Take control of YouTube and boost your user experience!
584,003 users
Dictionary Anywhere
View definitions easily as you browse the web. Double-click any word to view its definition in a small pop-up bubble. It also supports Spanish, German, French language alongside English. Enjoy Reading Uninterrupted!!!.
41,743 users
DownThemAll!
The Mass Downloader for your browser
212,322 users
Don't track me Google
Removes the annoying link-conversion at Google Search / maps / ...
67,849 users
Stylebot
Change the appearance of the web instantly
12,014 users
Imagus
With a simple mouse-over you can enlarge images and display images/videos from links.
61,383 users
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!)
54,086 users
Flagfox
Displays a country flag depicting the location of the current website's server and provides a multitude of tools such as site safety checks, whois, translation, similar sites, validation, URL shortening, and more...
115,498 users
Copy PlainText
Copy Plain Text without any formatting
28,966 users
Audio Equalizer
Stylish audio equalizer in toolbar popup.
37,698 users
Video DownloadHelper
Download videos from the web. Easy, smart, no tracking.
1,913,995 users
TinEye Reverse Image Search
Click on any image on the web to search for it on TinEye. Recommended by Firefox! Discover where an image came from, see how it is being used, check if modified versions exist or locate high resolution versions. Made with love by the TinEye team.
60,314 users
Read Aloud: A Text to Speech Voice Reader
Read out loud the current web-page article with one click. Supports 40+ languages.
145,353 users
Clear Cache
Clear browser cache with a single click or via the F9 key. F9 Fever! ;)
64,441 users
DuckDuckGo Privacy Essentials
Simple and seamless privacy protection for your browser: tracker blocking, cookie protection, DuckDuckGo private search, email protection, HTTPS upgrading, and much more.
1,499,399 users
SingleFile
Save an entire web page—including images and styling—as a single HTML file.
58,811 users