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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Ghostery
Compatible with Firefox 57+
Featured
Increase your browsing privacy, protection, and speed.
lesspass
Compatible with Firefox 57+
Featured
Use LessPass add-on to generate complex passwords and log in automatically to all your sites
Awesome Screenshot Plus - Capture, Annotate & More
Compatible with Firefox 57+
Featured
Capture the whole page or any portion, annotate it with rectangles, circles, arrows, lines and text, blur sensitive info, one-click upload to share. And more!
AdBlock for Firefox
Compatible with Firefox 57+
Featured
The most popular ad blocker for Chrome and Safari, now available for Firefox! Block all advertisements on all web pages, even Facebook, Youtube, and Hulu. Browse faster, too! Most ads aren't even downloaded at all, saving you time and bandwidth.
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.
YouTube™ Flash-HTML5
Compatible with Firefox 57+
Featured
Play YouTube™ Videos in Flash or HTML5 Player
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!
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!
EPUBReader
Compatible with Firefox 57+
Featured
With EPUBReader you can read ePub files just in Firefox. No additional software needed!
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.
Speed Dial (Lite)
Compatible with Firefox 57+
Featured
Access to your favorite websites via an stylish speed dial!
Pearltrees
Compatible with Firefox 57+
Featured
Pearltrees lets you organize all your interests.
Privacy Badger
Compatible with Firefox 57+
Featured
Protects your privacy by blocking spying ads and invisible trackers.
Fraudscore
Compatible with Firefox 57+
Featured
Block unwanted dangerous malware while keeping your personal information safe. Fraudscore's Artificial Intelligence tracks and blocks shady advertisements, malicious websites, and software that tries to steal your personal information.
Country Flags & IP Whois
Compatible with Firefox 57+
Featured
Displays country flag of website's server location, Whois and Geo info on a browser addressbar icon
Font Finder (revived)
Compatible with Firefox 57+
Featured
Get all CSS styles of selected text
LanguageTool Grammar Checker
Compatible with Firefox 57+
Featured
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.
Tab notifier
Compatible with Firefox 57+
Featured
Enables desktop notifications like in Chrome (e.g. Gmail, imo.im) and, if the site doesn't support them, it can notify new messages or updates detecting changes of the title (e.g. Hotmail, Yahoo, Facebook, Twitter). Even if the browser is minimized!
Tab Reloader (Page Reloader)
Compatible with Firefox 57+
Featured
An easy-to-use tab reloader with custom reloading time settings for individual tabs
Honey
Compatible with Firefox 57+
Featured
Automatically find and try coupon codes with 1-click. Works at thousands of stores in the US, Canada, Australia, India and the UK.
To create your own collections, you must have a Mozilla Add-ons account.
