![](https://addons.mozilla.org/user-media/hero-featured-image/clarisse-croset--tikpxRBcsA-unsplash.jpg?modified=1602004774)
automaticDark - Time-Based Theme Changer
Automatically change Firefox's theme based on the time.
14,297 users
Image Search Options
A customizable reverse image search tool that conveniently presents a variety of top image search engines.
42,855 users
Privacy Badger
Automatically learns to block invisible trackers.
1,805,026 users
Turbo Download Manager
A download manager with the ability to pause and resume downloads, download remote files, and more.
62,628 users
648 users
893 users
366 users
Privacy Badger
Automatically learns to block invisible trackers.
1,805,026 users
Enhancer for YouTube™
Take control of YouTube and boost your user experience!
664,599 users
Grammar and Spell Checker - LanguageTool
With this extension you can check text with the free style and grammar checker LanguageTool. It finds many errors that a simple spell checker cannot detect, like mixing up there/their, a/an, or repeating a word.
395,374 users
Search by Image
A powerful reverse image search tool, with support for various search engines, such as Google, Bing, Yandex, Baidu and TinEye.
392,901 users
LeechBlock NG
LeechBlock NG is a simple productivity tool designed to block those time-wasting sites that can suck the life out of your working day. All you need to do is specify which sites to block and when to block them.
115,585 users
Grammar and Spell Checker - LanguageTool
With this extension you can check text with the free style and grammar checker LanguageTool. It finds many errors that a simple spell checker cannot detect, like mixing up there/their, a/an, or repeating a word.
395,374 users
Search by Image
A powerful reverse image search tool, with support for various search engines, such as Google, Bing, Yandex, Baidu and TinEye.
392,901 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!!!.
49,048 users
1,172 users
293 users
893 users
SteamDB
Adds SteamDB links and new features on the Steam store and community. View lowest game prices and stats.
67,510 users
Augmented Steam
Augments your Steam Experience
61,370 users
Steam URL Opener
Allows you to open URLs inside Steam Client to save the hassle of logging in normal browser (with a single click on a button).
6,366 users
ProtonDB for Steam
Shows ratings from <a href="https://prod.outgoing.prod.webservices.mozgcp.net/v1/f8db0358d96c1a46b9a77aa02190de811e40819051b1d42dd013c17276046ffd/http%3A//protondb.com" rel="nofollow">protondb.com</a> on Steam
3,955 users
Video DownloadHelper
Download videos from the web. Easy, smart, no tracking.
1,935,291 users
Easy Youtube Video Downloader Express
A simple extension for superfast and easy YouTube downloads in FLV, 3GP, MP3, MP4, 720p, and 1080p formats.
515,957 users
Download All Images
Easily save images with a wide range of customization features, such as file size, dimensions, and image type.
95,655 users
Popup Blocker (strict)
Strictly block all popup requests from any website by default. A notification window is opened to allow you accept, reject, open the popup in background page, or redirect the current page to popup address
75,173 users