Add-ons
To try the thousands of add-ons available here, download Mozilla Firefox, a fast, free way to surf the Web!
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Choose from thousands of extra features and styles to make Firefox your own.
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Reader
Compatible with Firefox 57+
Featured
Reader is the ultimate Reader tool for Firefox.
lesspass
Compatible with Firefox 57+
Featured
Use LessPass add-on to generate complex passwords and log in automatically to all your sites
YouTube High Definition
Compatible with Firefox 57+
Featured
YouTube High Definition is a powerful tool that will let you automatically play all YouTube videos in HD (High Definition), turn off annotations, change video player size, auto stop videos, auto mute videos, control embedded videos and much more.
Blur
Compatible with Firefox 57+
Featured
Protect your Passwords, Payments, and Privacy.
Forecastfox (fix version)
Compatible with Firefox 57+
Featured
Get international weather forecasts from AccuWeather.com and display them in any toolbar or statusbar with this highly customizable and unobtrusive extension.
Now Available for: Firefox, Thunderbird and SeaMonkey!
Grammarly for Firefox
Compatible with Firefox 57+
Featured
Grammarly will help you communicate more effectively. As you type, Grammarly flags mistakes and helps you make sure your messages, documents, and social media posts are clear, mistake-free, and impactful.
Reverse Image Search
Compatible with Firefox 57+
Featured
Capture, Reverse Image Search is a powerful capturing reverse image search tool built on top of TinEye engine.
QR Code Image Generator
Compatible with Firefox 57+
Featured
Create a QR code of the selected text, current url or hyperlink. Also possible to create a QR Code from free text within Firefox. Now with UTF8 support.
Easy Youtube Video Downloader Express
Compatible with Firefox 57+
Featured
WORKS WITH NEW YOUTUBE LAYOUT, "Best Youtube Video Downloader", Only one with 1080p Full-HD and 256kbps MP3 Direct Links. A clean, fast and simple addon for superfast and easy downloads in FLV, 3GP, MP3, MP4, 720p, 1080p qualities on Youtube pages.
AdBlocker for YouTube™
Compatible with Firefox 57+
Featured
Removes all annoying Ads from YouTube
TinEye Reverse Image Search
Compatible with Firefox 57+
Featured
TinEye is a reverse image search engine. The extension adds a context menu item so you can search for an image to find out where it came from, how it is being used, if modified versions of the image exist, or to find higher resolution versions.
Cookie AutoDelete
Compatible with Firefox 57+
Featured
Control your cookies! This WebExtension is inspired by Self Destructing Cookies. When a tab closes, any cookies not being used are automatically deleted. Whitelist the ones you trust while deleting the rest. Support for Container Tabs (Firefox 53+).
Pearltrees
Compatible with Firefox 57+
Featured
Pearltrees lets you organize all your interests.
Google™ Translator Lite
Compatible with Firefox 57+
Featured
a powerful tool to translate words or sentences
Instant Translate: Ultimate Translator
Compatible with Firefox 57+
Featured
Translator, dictionary and text-to-speech for 103 languages. Select and translate on any page with a shortcut on double-click.
Youtube Dark Mode
Compatible with Firefox 57+
Featured
Switch youtube to dark mode. Dark mode will help devices save battery and useful for your sleeping. Make donation for us http://www.paypal.me/hoangthanh. Thank you!
Font Finder (revived)
Compatible with Firefox 57+
Featured
Get all CSS styles of selected text
Dark YouTube Theme
Compatible with Firefox 57+
Featured
Shut down the lights on YouTube.
Enjoy!
AdBlocker Ultimate
Compatible with Firefox 57+
Featured
Free and improved ad blocker. Completely remove ALL ads. No "acceptable" ads or whitelisted advertisers, block tracking, block malware!
Zoom Page WE
Compatible with Firefox 57+
Featured
Zoom web pages (either per-site or per-tab) using full-page zoom, text-only zoom, automatic fit-to-width and minimum font size.
To create your own collections, you must have a Mozilla Add-ons account.
