Featured Extensions


ChatZilla Featured

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

Rated 4 out of 5 stars (126)
149,886 users

YouTube High Definition No Restart 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.

Rated 5 out of 5 stars (206)
289,311 users

ZenMate Security & Privacy VPN No Restart Featured

Unblock the web and change your IP with 4 locations across the globe. ZenMate secures your browsing with encryption - protecting you from hackers, snoopers and data thieves who prey on unsecure connections.

Rated 4 out of 5 stars (135)
201,049 users

Add Google Search To New Tab Page Featured

An extension that adds a Google search box to the standard Firefox new tab page

Rated 4 out of 5 stars (25)
38,370 users

Classic Toolbar Buttons No Restart Featured

'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 (144)
40,057 users

Blur No Restart Featured

Protect your Passwords, Payments, and Privacy.

Rated 3 out of 5 stars (702)
260,095 users

Gmail™ Notifier Plus No Restart Featured

Gmail™ Notifier Plus alerts you of new email messages. Users can also read or reply to emails, delete or mark them as read, all without having to open a new window.

Rated 4 out of 5 stars (45)
38,474 users

YouTube Anywhere Player No Restart Featured

Watch videos anywhere in cinema mode without leaving the website you're on.

Rated 5 out of 5 stars (58)
28,815 users

OmniSidebar No Restart Featured

Bring your bookmarks into view with just a gesture. Move the sidebar across the screen. Open a different sidebar by just clicking its title. And more! Keeps your sidebar simple and quick to access!

Rated 5 out of 5 stars (84)
21,060 users

Tamper Data Featured

Use tamperdata to view and modify HTTP/HTTPS headers and post parameters...

Rated 4 out of 5 stars (132)
113,795 users

Converter Featured

Contextual (inline) unit, timezone, and currency converter on any web site, plus custom conversions for offline text. Shopping assistant also included -- find the best deals online! (Currency conversions and shopping assistant disabled by default.)

Rated 5 out of 5 stars (74)
9,945 users

Google search link fix No Restart Featured

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 (127)
65,792 users

Beyond Australis No Restart Featured

Australis was the code name for the current Firefox theme, it aimed to make a great browser look awesome. Now you can go one step further and also make it feel awesome to use!

Rated 5 out of 5 stars (245)
39,321 users

FindBar Tweak No Restart Featured

Between simple tweaks such as placing the findbar in the top corner, to the powerful "Find in All Tabs" tool, it has everything to make the Find Toolbar a powerful and accessible research tool!

Rated 5 out of 5 stars (228)
30,419 users

Undo Closed Tabs Button Featured

Tired of going to History -> Recently Closed Tabs just to undo a closed tab? Then this extension is for you!

This extension allows you to undo closed tabs via a toolbar button or the right-click context menu.

Rated 4 out of 5 stars (363)
51,998 users

DownThemAll! Featured

The first and only download manager/accelerator built inside Firefox!

Rated 5 out of 5 stars (1,611)
1,364,047 users

The Addon Bar (Restored) No Restart Featured

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

Rated 5 out of 5 stars (276)
126,844 users

SaveAS Featured

Save AS anything with a click of a button. It is handy for web image collection addicts.

Rated 3 out of 5 stars (19)
17,258 users

QuickMark No Restart Featured

A quick and minimalistic way to create bookmarks.

Rated 5 out of 5 stars (39)
8,988 users

Video WithOut Flash No Restart Featured

Watch videos without flash

Rated 4 out of 5 stars (54)
86,589 users