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Conspiracy

Shows flag/country of involved Certification Authorities (CAs) for secured pages.

Rated 5 out of 5 stars (3)
377 users

Quitomzilla

Quitomzilla helps you quit smoking while you surf the web or wait for new emails, showing the cigarettes, money and time you have saved since you quit...

Rated 5 out of 5 stars (18)
375 users

InlineDisposition Reloaded No Restart

InlineDisposition Reloaded changes the disposition type of "Content-Disposition" response headers from "attachment" and "file" to "inline"

Rated 5 out of 5 stars (2)
370 users

Display mailing list header

This extension implements RFC 2369 for Thunderbird: Special mailing list header fields in the mail are parsed, and the links are displayed in the extended header view. You can click them to simply go to the archive, request help or unsubscribe.

Rated 3 out of 5 stars (6)
366 users

FireCsv No Restart

View pretty CSV directly from within Firefox and Thunderbird.

Rated 5 out of 5 stars (1)
365 users

Add-on Preferences Button No Restart

Displays a menu that allows you to open the option/preference window for any add-on that has one.

Rated 5 out of 5 stars (2)
363 users

Element Hiding Helper for Pan No Restart

Help you create element hiding rules for Pan to fight the text ads.

Rated 5 out of 5 stars (4)
362 users

Macro Template No Restart

Macro Template is to replace mail templates with macros for date formatting.

Rated 5 out of 5 stars (1)
357 users

MonkeyFix

Fixes up numerous SeaMonkey browser interface issues (eg. adding support for popup ALT attributes), as well as adding some handy features for developers and power users (eg. configure source viewer, work online/offline).

Rated 5 out of 5 stars (3)
357 users

ScrapBook AutoSave Improved

ScrapBook AutoSave Addon, with some extra features.

Rated 3 out of 5 stars (5)
357 users

EDS Calendar Integration

Integrates calendars events with Gnome clock applet

IMPORTANT:
Plugin may hang on Fedora.
As a workaround uninstall evolution-ews.

Rated 4 out of 5 stars (7)
345 users

JSON Inspector No Restart

Inspect JSON object from a URL or entered data.
Requires either DOM Inspector or DOM Inspector Plus! [dm] extension.

Not yet rated
340 users

CloseTab

Lightweight add-on which adds to right-click menu 3 items allowing to close current tab, open a new one and reopen closed one. Right-click anywhere on site instead of using keyboard or finding buttons.

Rated 4 out of 5 stars (3)
338 users

Tools > Options… for Linux No Restart

Moves Edit > Preferences to Tools > Options…

Rated 5 out of 5 stars (7)
336 users

bioFOX

Bioinformatics tools on Mozilla based browsers

Rated 5 out of 5 stars (20)
325 users

ChatZilla zh-CN Language Pack

ChatZilla zh-CN language pack for ChatZilla 0.9.91.1

Rated 5 out of 5 stars (11)
321 users

NiceReader

NiceReader is designed for web reading. You can customize font, color, size, background, specify the elements to read, filiter ad elements, filiter ad strings, automaticaly turn page.

Rated 5 out of 5 stars (2)
315 users

FromWhereToWhere

Link suggestion: based on user's local browsing history only.
Browsing history searching: list the pages from where you visited one page, and all the other pages you visited from those pages. Keywords searching, Scrapbook support, naive sharing.

Rated 5 out of 5 stars (11)
314 users

XPCOMViewer

XPCOMViewer is tiny tool for exploring XPCOM components.

Rated 4 out of 5 stars (6)
314 users

Zippy Extension Packager No Restart

Creates XPI files of extensions you have installed.

Rated 5 out of 5 stars (13)
313 users