Recently Updated Extensions

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RequestPolicy Continued No Restart

Be in control of which cross-site requests are allowed. Improve the privacy of your browsing by not letting other sites know your browsing habits. Secure yourself from Cross-Site Request Forgery (CSRF) and other attacks.

Rated 4 out of 5 stars (5)
7,700 users
Updated June 26, 2016

YouTube Video Replay No Restart

YouTube Video Replay is a new tool that lets you replay YouTube Videos.

Rated 5 out of 5 stars (30)
10,139 users
Updated June 26, 2016

RemindMeBot-Reddit No Restart

All the great features of /u/RemindMeBot in a quick and easy to use extension!

Not yet rated
33 users
Updated June 26, 2016

AdNauseam No Restart

Fight back against advertising surveillance

Rated 5 out of 5 stars (3)
4,929 users
Updated June 25, 2016

LookOut (fix version)

LookOut is a plugin which allows Thunderbird to interface with Microsoft's mail tools by decoding metadata and attachments encapsulated/embedded in a TNEF encoded attachment (aka winmail.dat).
Support: Thunderbird and SeaMonkey

Rated 5 out of 5 stars (1)
1 user
Updated June 25, 2016

Hide Fullscreen Alert No Restart

Hide Fullscreen Alert

Rated 4 out of 5 stars (6)
660 users
Updated June 25, 2016

Stop Watch timer (Sea Monkey) No Restart

Stop Watch timer for Sea Monkey

Not yet rated
0 users
Updated June 25, 2016

Tasks Scheduler (Sea Monkey) No Restart

Keep a list of your important todo list in one place.

Not yet rated
0 users
Updated June 25, 2016

Big Navigation No Restart

enlarging the navigation links on the pages

Rated 5 out of 5 stars (6)
780 users
Updated June 25, 2016

uMatrix No Restart

Point & click to forbid/allow any class of requests made by your browser. Use it to block scripts, iframes, ads, facebook, etc.

Rated 5 out of 5 stars (86)
37,417 users
Updated June 24, 2016

Gmail Mail Sidebar No Restart

Gmail Mail Sidebar brings Gmail right into your Firefox Sidebar.

Rated 5 out of 5 stars (4)
11,618 users
Updated June 24, 2016

Facebook Share Button No Restart

Facebook Share Button lets you share any web page on your Facebook Timeline by a quick Facebook button.

Rated 5 out of 5 stars (25)
11,582 users
Updated June 24, 2016

S3.Google Translator

S3.Google Translator adds the power of Google Translate’s automatic translations to your browser!
It supports translation of selected text, entered phrase or whole webpage between any of 80+ languages.

New Feature: Language learning!

Rated 5 out of 5 stars (347)
365,708 users
Updated June 24, 2016

Google Reverse Image Search No Restart

Google Reverse Image Search is a simple tool that lets you search the images reversely on Google Images and find the other copies of the very image you are looking for on the web.

Rated 5 out of 5 stars (8)
20,261 users
Updated June 24, 2016

Open With Google Chrome No Restart

Open With Google Chrome sends pages from Mozilla Firefox to Google Chrome.

Rated 5 out of 5 stars (5)
12,659 users
Updated June 24, 2016

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 4 out of 5 stars (84)
18,729 users
Updated June 24, 2016

uBlock Origin No Restart

Finally, an efficient blocker. Easy on CPU and memory.

Rated 5 out of 5 stars (546)
1,254,339 users
Updated June 23, 2016

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 (150)
39,046 users
Updated June 22, 2016

AdSidebar No Restart

Live in harmony with ads.

AdSidebar is an alternative to traditional ad blocker extensions that benefits both the user and content creators. Ads are displayed in a sidebar on the right side of the screen.

Not yet rated
3 users
Updated June 22, 2016

YouTube Video Center No Restart

Youtube Video Center changes the new Youtube design and centers the whole Youtube page on the screen automatically.

Rated 5 out of 5 stars (12)
6,460 users
Updated June 22, 2016