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by nk23x

61 Add-ons in this Collection

uBlock Origin by Raymond Hill

Rated 5 out of 5 stars 4,983 reviews

4,977,535 users

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

Stylish - Custom themes for any website by userstyles.org

Rated 4 out of 5 stars 1,281 reviews

322,377 users

Stylish lets you customize any website with custom user styles (themes for websites). Choose from the largest userstyles library to change the color scheme, background, and skin for Google, Facebook, YouTube and many, many more sites.

Enigmail by Patrick Brunschwig

Rated 4 out of 5 stars 207 reviews

138,013 users

OpenPGP message encryption and authentication for Thunderbird and SeaMonkey.

uMatrix by Raymond Hill

Rated 5 out of 5 stars 331 reviews

85,574 users

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

Provider for Google Calendar by Philipp Kewisch

Rated 4 out of 5 stars 968 reviews

323,166 users

Allows bidirectional access to Google Calendar

EPUBReader by epubreader

Rated 4 out of 5 stars 254 reviews

225,246 users

With EPUBReader you can read ePub files just in Firefox. No additional software needed!

SQLite Manager by lazierthanthou

Rated 4 out of 5 stars 315 reviews

106,951 users

Manage any SQLite database on your computer.

User Agent Switcher by chrispederick

Rated 4 out of 5 stars 321 reviews

152,548 users

The User Agent Switcher extension adds a menu and a toolbar button to switch the user agent of a browser.

Screengrab! by Oleksandr

Rated 4 out of 5 stars 351 reviews

86,817 users

Screengrab! Saves or upload webpages as images.

gContactSync by Josh Geenen

Rated 4 out of 5 stars 237 reviews

89,965 users

Synchronizes contacts & groups between Thunderbird or SeaMonkey and Google Contacts. Imports Facebook friends, contacts you follow on Twitter, and more.

Mail Merge by Alexander Bergmann

Rated 5 out of 5 stars 155 reviews

59,546 users

Mass Mail and Personal Mail

Imagus by Deathamns

Rated 4 out of 5 stars 245 reviews

51,903 users

Enlarge thumbnails, and show images/videos from links with a mouse hover.

Theme Font & Size Changer by Baris Derin, Access Firefox Project

Rated 4 out of 5 stars 340 reviews

72,568 users

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.

Password Exporter by Justin Scott (fligtar), Jorge Villalobos

Rated 4 out of 5 stars 537 reviews

141,296 users

This add-on allows you to export your saved passwords and disabled login hosts using XML or CSV files that can be imported later.

Note: This add-on won't work in Firefox 57. It may eventually if the APIs to access passwords are implemented.

Session Manager by Michael Kraft

Rated 5 out of 5 stars 837 reviews

184,179 users

Session Manager saves and restores the state of all or some windows - either when you want it or automatically at startup and after crashes. It can also automatically save the state of open windows individually.
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