Top-Rated Extensions

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Theme Font & Size Changer No Restart

Theme Font & Size Changer lets you change the global font size and font family used for the user interface in Firefox. Design your browser with your favorite font.

Rated 5 out of 5 stars (141)
96,555 users

Classic Toolbar Buttons No Restart

'Classic Toolbar Buttons' add-on restores old toolbar button ui (known from Fx 4-7s small view, Fx 4-12s large view & Tb 5-14) for current Firefox, Thunderbird and Seamonkey versions on Windows.

Beta builds on versions page!

Rated 5 out of 5 stars (139)
43,015 users

QuickFolders (Tabbed Folders)

The "Swiss army knife" of folders. Turn your favorites into tabs - open folders and subfolders, move mails without scrolling around or searching. powerful + easy.

See new mail at a glance after automatic filtering - supports quickFilters addon!

Rated 5 out of 5 stars (108)
26,694 users

YouTube High Definition No Restart

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.

Rated 5 out of 5 stars (198)
295,590 users

Old Default Image Style No Restart

Restores the default image style used for top-level images in previous versions of Firefox.

Rated 5 out of 5 stars (89)
12,870 users

Private Tab No Restart

Adds private tabs.

Rated 5 out of 5 stars (175)
78,798 users

Copy Plain Text 2

Copies text without formatting

Rated 5 out of 5 stars (54)
38,790 users

Google search link fix No Restart

This extension prevents Google, Yahoo and Yandex search pages from modifying search result links when you click them. This is useful when copying links but it also helps privacy by preventing the search engines from recording your clicks.

Rated 5 out of 5 stars (107)
69,967 users

Go Parent Folder

Add "Go Parent Folder" menu to context menu in The Library list view and Search result in Bookmarks Sidebar.

Rated 5 out of 5 stars (93)
8,850 users

Webmaster SAPE

Toolbar contains a set of functions, which expands the abilities of webmasters and optimizers, when working in the interface of SAPE exchange.

Rated 5 out of 5 stars (162)
10,905 users

SmoothWheel

Scrolls the page smoothly when scrolling the mouse wheel (or keyboard arrows if enabled).

Rated 5 out of 5 stars (242)
51,968 users

Open With Photoshop No Restart

Open With Photoshop is a new companion for web and graphic designers to open up any web image with Adobe Photoshop via a single and quick mouse click.

Rated 5 out of 5 stars (43)
15,357 users

Show My Password

You are annoyed because your password fields are always scrambled though nobody else but you can see the screen? This most advanced unscrambling addon shows your passwords in readable letters, while being fully customizable to fit your needs.

Rated 5 out of 5 stars (70)
35,684 users

Forecastfox (fix version)

Get international weather forecasts from AccuWeather.com and display them in any toolbar or statusbar with this highly customizable and unobtrusive extension.

Rated 5 out of 5 stars (108)
16,828 users

Stylish Sync No Restart

Sync engine for Stylish with backup / restore facility.

Rated 5 out of 5 stars (19)
6,186 users

XNote++

Persistent sticky notes for Thunderbird associated to mails.
This is a port to Thunderbird >= 3 and Seamonkey >= 2 based on XNote 2.1.0 ( https://addons.mozilla.org/en-US/thunderbird/addon/3093 ) with bugfixes and additional features.

Rated 5 out of 5 stars (62)
21,559 users

Facebook Toolbar Button No Restart

Facebook Toolbar Button lets you visit your Favorite Facebook quickly and easily by adding a special Facebook Button to your Toolbar.

Rated 5 out of 5 stars (16)
30,834 users

FlashGot Mass Downloader Featured

Download all the links, movies and audio clips of a page at the maximum speed with a single click, using the most popular, lightweight and reliable external download managers.

Rated 5 out of 5 stars (480)
1,101,805 users

Add-ons Manager Context Menu

Add more items to Add-ons Manager context menu.

Rated 5 out of 5 stars (27)
11,216 users

Adblock Plus No Restart Featured

Blocks annoying video ads on YouTube, Facebook ads, banners and much more.

Adblock Plus blocks all annoying ads, and supports websites by not blocking unobtrusive ads by default (configurable).

Rated 5 out of 5 stars (4,834)
22,012,506 users