Most Popular Extensions

Subscribe

R-kiosk Requires Restart

Real Kiosk is a Firefox extension that defaults to full screen, disables all menus, toolbars, key commands and right button menus. Alt+Home still takes you home. ...

Rated 4 out of 5 stars (111)
106,658 users

Tab Groups Featured

Tab Groups are an easy way to organize a lot of tabs. You can visually group related tabs, switch between groups, and quickly search through all of your tabs to switch to a specific one.

Rated 5 out of 5 stars (669)
105,535 users

Cookies Manager+ Requires Restart

Cookies manager to view, edit and create new cookies. It also shows extra information about cookies, allows edit multiple cookies at once and backup/restore them.

Rated 5 out of 5 stars (66)
105,013 users

Honey Compatible with Firefox 57+

Automatically find and try coupon codes with 1-click. Works at thousands of stores in the US, Canada, Australia, India and the UK.

Rated 4 out of 5 stars (161)
104,846 users

Bulk Media Downloader Compatible with Firefox 57+ Featured

Grab and download media (image, audio, and video) resources by monitoring network (like FlashGot or Flash video downloader extensions)

Rated 4 out of 5 stars (86)
104,617 users

Fasterfox Requires Restart

STILL WORKS FLAWLESSLY AS OF 12-5-2016
The One; The Original Fasterfox Gives performance & network tweaks for Firefox. Fasterfox makes your browsing so much faster!
Make your Sites Faster than a Fox with Fasterfox for FireFox!

Rated 4 out of 5 stars (81)
104,189 users

Tree Style Tab Requires Restart

Show tabs like a tree.

Rated 4 out of 5 stars (1,251)
103,588 users

ChatZilla Requires Restart

A clean, easy to use and highly extensible Internet Relay Chat (IRC) client.

Rated 4 out of 5 stars (126)
102,539 users

Tab Scope Requires Restart Featured

Preview and navigate tab contents through popup.

Rated 4 out of 5 stars (451)
102,349 users

Fast Dial Requires Restart

Visual bookmarks for Firefox.

Rated 3 out of 5 stars (2,332)
100,561 users

DOM Inspector Requires Restart

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.

Rated 5 out of 5 stars (72)
100,520 users

New Tab Override (browser.newtab.url replacement) Featured

This add-on brings back the ability to change the page which is shown when opening a new tab.

Rated 5 out of 5 stars (147)
100,082 users

Google Scholar Button

Lookup scholarly articles as you browse the web.

Rated 4 out of 5 stars (18)
99,189 users

UnMHT

UnMHT allows you to view MHT (MHTML) web archive format files, and save complete web pages, including text and graphics, into a single MHT file in Firefox/SeaMonkey.

Rated 4 out of 5 stars (234)
98,621 users

HttpRequester Requires Restart

A tool for easily making HTTP requests (GET/PUT/POST/DELETE), viewing the responses, and keeping a history of transactions.

Rated 4 out of 5 stars (65)
97,818 users

The Addon Bar (Restored)

Gives you a place to put all your add-on buttons without over-crowding the navigation bar.

Rated 5 out of 5 stars (322)
96,414 users

Toolbar Buttons

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.

Rated 4 out of 5 stars (312)
96,231 users

FEBE Requires Restart

FEBE (Firefox Environment Backup Extension) allows you to quickly and easily backup your Firefox extensions. In fact, it goes beyond just backing up -- It will actually rebuild your extensions individually into installable .xpi files.

Rated 4 out of 5 stars (618)
95,857 users

FirePath Requires Restart

FirePath is a Firebug extension that adds a development tool to edit, inspect and generate XPath 1.0 expressions, CSS 3 selectors and JQuery selectors (Sizzle selector engine).

Rated 4 out of 5 stars (24)
94,348 users

TinEye Reverse Image Search Compatible with Firefox 57+

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.

Rated 4 out of 5 stars (191)
94,150 users