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by nk23x

61 Add-ons in this Collection

uBlock Origin by Raymond Hill

Rated 5 out of 5 stars 4,462 reviews

5,219,688 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 1,214 reviews

331,198 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.

Provider for Google Calendar by Philipp Kewisch

Rated 4 out of 5 stars 964 reviews

348,060 users

Allows bidirectional access to Google Calendar

uMatrix by Raymond Hill

Rated 5 out of 5 stars 294 reviews

85,378 users

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

Enigmail by Patrick Brunschwig

Rated 4 out of 5 stars 200 reviews

146,535 users

OpenPGP message encryption and authentication for Thunderbird and SeaMonkey.

EPUBReader by epubreader

Rated 4 out of 5 stars 248 reviews

242,017 users

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

Imagus by Deathamns

Rated 4 out of 5 stars 211 reviews

48,687 users

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

SQLite Manager by lazierthanthou

Rated 4 out of 5 stars 269 reviews

118,533 users

Manage any SQLite database on your computer.

gContactSync by Josh Geenen

Rated 4 out of 5 stars 231 reviews

96,653 users

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

Screengrab! by Oleksandr

Rated 5 out of 5 stars 341 reviews

92,290 users

Screengrab! Saves or upload webpages as images.

User Agent Switcher by chrispederick

Rated 4 out of 5 stars 311 reviews

162,984 users

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

Mail Merge by Alexander Bergmann

Rated 5 out of 5 stars 153 reviews

63,651 users

Mass Mail and Personal Mail

Password Exporter by Justin Scott (fligtar), Jorge Villalobos

Rated 4 out of 5 stars 518 reviews

158,274 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.

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

Rated 4 out of 5 stars 328 reviews

80,768 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.

Session Manager by Michael Kraft

Rated 5 out of 5 stars 821 reviews

203,323 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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