Top-Rated Extensions


FAYT Revived

Regain possesion of your good "Find As You Type" search bar in Firefox and SeaMonkey!

Rated 4 out of 5 stars (4)
191 users


View and Edit source of HTML element...

Rated 3 out of 5 stars (20)
1,788 users


SyncKolab can synchronize your calendar, address book and tasks against an IMAP server in Kolab formats version 1 (vCard/iCal) or version 2 (XML) or turn your Thunderbird/Lightning into a native Kolab Client (

Rated 3 out of 5 stars (74)
8,601 users


Shows an icon on the status bar when the mouse cursor is over a link to a page you bookmarked or visited before. Update for fcp's addon

Rated 4 out of 5 stars (9)
23 users

Cycle Collector Analyzer, about:ccdump No Restart

Display the graph created by cycle collector. Open "about:ccdump" page after the installation.

Rated 4 out of 5 stars (6)
397 users

MetaProducts Integration

Integrate MetaProducts software with Mozilla browsers. Download links and Web sites using Mass Downloader and Offline Explorer. Save Web pages as you see them for future reference with MetaProducts Inquiry.

Rated 4 out of 5 stars (6)
4,984 users

Gmail S/MIME

Send and receive signed and encrypted messages in Gmail.

Rated 3 out of 5 stars (48)
3,111 users

EDS Calendar Integration

Integrates calendars events with Gnome clock applet

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

Rated 4 out of 5 stars (5)
303 users


PDF export support by Gecko.

Rated 4 out of 5 stars (5)
870 users

docked JS-Console

docks the JS-Console to the Bottom of the Browser

feel free to have a look at the source (see below) and suggest enhancements (borstel33 web de , Subject: docked JS-Console)

Rated 4 out of 5 stars (10)
237 users

easy Xdebug

This addon was built to make debugging while using netbeans PHP easier.

Rated 3 out of 5 stars (38)
7,947 users

PageTweak - Ad Blocker, Video Downloader, Translator... No Restart

The Ultimate Webpage Enhancer! Instantly add many tweaks to any webpage including: Ad block, flash block, video download, remove delays, tooltip translation, link checker, rounded corners, auto pagerize, and more. A must have for all web users.

Rated 3 out of 5 stars (23)
6,626 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)
308 users

Cycle Input Focus Plus

Cycle through (text) inputs with a keycombo. Find and focus username and password fields (works great with external password managers, like KeePass). Based on the Cycle Input Focus add-on by P.C Spruijtenburg

Rated 5 out of 5 stars (2)
21 users

Stylish Tools

Quicker access to several Stylish features through a toolbar button and/or keyboard shortcuts. Available for Firefox, Thunderbird, and SeaMonkey

Rated 5 out of 5 stars (2)
1,327 users

Filter Uploader for Adblock Plus

DOES NOT BLOCK ADS! Don't install this add-on if you don't know what 'uploading' means!

This add-on Uploads the filters from your Adblock Plus installation to a FTP, HTTP, HTTPS server...

Rated 3 out of 5 stars (45)
23,977 users


This addon blocks sites containing pornographic materials.

Rated 3 out of 5 stars (76)
89,354 users


ConfigDate allows to configure the "Date" column in message threadpane. When displaying the message header, it is possible to display the (default) formated date or the senders local sent time (Date-String).

Rated 3 out of 5 stars (24)
12,003 users

1-click Online Document View

Open DOC, DOCX, PDF, PPT, PPTX and TIFF files linked in any webpage directly with Google Docs viewer using "1-click Online Document View", with a single left-click of your mouse / trackpad!!

Rated 4 out of 5 stars (5)
2,462 users

About:about Button No Restart

A button that lists all the about pages that exist. Some of these pages are also provided as separate buttons.

Rated 4 out of 5 stars (3)
229 users