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Welcome to Firefox Add-ons.
Choose from thousands of extra features and styles to make Firefox your own.Close
Most Popular Extensions
HTTPS Everywhere Featured
Encrypt the web! HTTPS Everywhere is a Firefox extension to protect your communications by enabling HTTPS encryption automatically on sites that are known to support it, even when you type URLs or follow links that omit the https: prefix.
Download from YouTube 4K videos and thousands other video websites.
Notice: some important features (XML indentation and load old saved requests) are missing in version 2.0.0, please update to version 2.0.1.
Please follow the link ("View other versions") below To install version 2.0.1.
Status bar widgets and progress indicators for Firefox 4+
Official Amazon Add-on. Add anything from any website to your Amazon Wish List.
(**NEW** now functions for all Amazon retail sites (amazon.com, amazon.co.uk, amazon.de, amazon.it, amazon.fr, amazon.co.jp. amazon.cn, and amazon.ca.)
Screengrab (fix version) Featured
Screengrab! saves webpages as images.
New features: upload to internet
A clean, easy to use and highly extensible Internet Relay Chat (IRC) client.
DuckDuckGo Plus No Restart Featured
DuckDuckGo is the search engine that doesn't track you. We also have smarter answers and less clutter. This extension makes DuckDuckGo available in the address bar, search bar and right-click menu. Also adds a handy toolbar button with more features!
Adguard AdBlocker No Restart
Unmatched adblock extension against advertising and pop-ups. Blocks ads on Facebook, Youtube and all other websites.
Visual bookmarks for Firefox. (Works with all latest versions of Firefox)
Bluhell Firewall No Restart Featured
Get a faster browsing experience by blocking nasty web resources using Bluhell Firewall, the lightweight Ad-Blocker and Tracking/Privacy Protector.
Manage popular downloaders (Windows, Linux, Mac) and support special links of thunder,flashget,qqdl,ed2k,magnet,fs2you.
Toolbar Buttons No Restart Featured
Adds toolbar buttons to the customize toolbar window in several programs including Firefox, Thunderbird and SeaMonkey. Some of the buttons make commonly preformed actions quicker, others add new functionality.
DOM Inspector is a tool that can be used to inspect and edit the live DOM of any web document or XUL application. The DOM can be navigated using a two-paned window displaying a variety of different views on the document and all nodes within.
Self contained add-on for downloading youtube videos to mp3 for easy listening on podcasting gadgets like a Zune or iPod
New Tab Homepage No Restart
A very simple tabbed browsing extension that loads your homepage when you open a new tab. If you have multiple homepages, the first is chosen.
Webmail Ad Blocker No Restart Featured
Expand your email area by blocking and removing ads on the right hand side of the screen when using Gmail, Hotmail, Outlook.com and Yahoo Mail.
Youtube and more – Easy Video Downloader No Restart
Download and save videos playing on a website like youtube to your hard disk
YouTube ALL HTML5 No Restart Featured
Play all videos on youtube without flash in your preferred size using only HTML5.
As of Firefox 33, Venkman *no longer works*, as the APIs which it needs have been removed.