essential addons

by nk23x

30 Add-ons in this Collection

User Agent Switcher by chrispederick

Rated 4 out of 5 stars 276 reviews

255,398 users

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

EPUBReader by epubreader

Rated 5 out of 5 stars 189 reviews

324,040 users

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

Provider for Google Calendar by Philipp Kewisch

Rated 4 out of 5 stars 909 reviews

275,296 users

Allows bidirectional access to Google Calendar

Session Manager by Michael Kraft

Rated 4 out of 5 stars 458 reviews

245,157 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.

Torrent Tornado by Oleksandr

Rated 5 out of 5 stars 89 reviews

45,030 users

A Torrent Client for Firefox and SeaMonkey, runs everywhere, created in pure JavaScript without binary software!

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

Rated 5 out of 5 stars 169 reviews

94,556 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.

Enigmail by Patrick Brunschwig

Rated 4 out of 5 stars 199 reviews

136,149 users

OpenPGP message encryption and authentication for Thunderbird and SeaMonkey.

Screengrab (fix version) by Oleksandr

Rated 5 out of 5 stars 250 reviews

100,066 users

Screengrab! saves webpages as images.
0.99 released!
New features: upload to internet

Mozilla Archive Format, with MHT and Faithful Save by Christopher Ottley, Paolo Amadini

Rated 4 out of 5 stars 298 reviews

122,774 users

— Open web pages saved with Internet Explorer or other browsers (MHT)
— Save many tabs, video and audio reliably, in a single ZIP file (MAFF)
— Return to the original site you saved a page from, and more!

YesScript by Jason Barnabe

Rated 4 out of 5 stars 204 reviews

61,228 users

A JavaScript blacklist

Remote XUL Manager by Jorge Villalobos

Rated 5 out of 5 stars 37 reviews

47,947 users

Manages the Remote XUL whitelist to allow websites and local files to load XUL content. For versions compatible with Firefox 41 and lower, see All Versions page below.

Disable Add-on Compatibility Checks by Kris Maglione

Rated 4 out of 5 stars 108 reviews

34,328 users

Reinstates the extensions.checkCompatibility preference without respect to the current application version.

Copy Urls Expert by Kashif Iqbal Khan

Rated 5 out of 5 stars 81 reviews

66,975 users

Copy multiple urls (links) to clipboard. Provides options to copy urls of all opened tabs and urls in selected text. You can customize the format of copied urls. You can also open multiple links from clipboard.

Form History Control by Stephan Mahieu

Rated 5 out of 5 stars 94 reviews

20,252 users

Manage form history entries (search, edit, cleanup, export/import) and easy text formfiller.

Auto-save text entered in any form while typing to allow fast recovery when disaster strikes.

Control for which webpage form history is saved or not.

Scriptish by Erik Vold, Nils Maier, others

Rated 4 out of 5 stars 124 reviews

42,327 users

The greatest user script engine on the Internet (a fork of Greasemonkey).
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