Top-Rated Extensions

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PrivaConf

Automatically apply settings recommended by security and privacy experts.

Rated 3 out of 5 stars (3)
526 users

mozCleaner

Cleans your Firefox, Thunderbird, SeaMonkey, Fennec (unstable), Instantbird and BlueGriffon.

Rated 3 out of 5 stars (6)
1,381 users

Easy Notes

One Extension to manage Notes, Reminders, Todos , Favorite pages and Website-specific-search.

Rated 3 out of 5 stars (6)
113 users

Display mailing list header Requires Restart

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 (7)
12 users

ALLYouTubeDownloader Requires Restart

ALLYouTubeDownloader extention (FLV/MP4/WebM; HD/HQ). Windows only. Works only with ALL YouTube Downloader 2.3 application or higher (versions 2.2 and lower doesn't work anymore).
Homepage: http://www.allplayer.org/youtube-to-allplayer

Rated 3 out of 5 stars (8)
6,820 users

Crash Me Now! (Simple)

Crash yourself with ease

Rated 4 out of 5 stars (1)
61 users

Subasa Tamil to Sinhala Transliteration Requires Restart

Tamil To Sinhalese Transliteration provide by Subasa Language Service

Rated 4 out of 5 stars (1)
70 users

supprimé Requires Restart

supprimé

Rated 4 out of 5 stars (1)
8 users

EzStylist Requires Restart

Allows including CSS when composing e-mails.

Rated 4 out of 5 stars (1)
0 users

MailNews Sync Requires Restart

New mailnews sync engine for Seamonkey and Thunderbird. Requires Firefox Sync extension.

Rated 4 out of 5 stars (1)
0 users

Indian Language Transliterator Requires Restart

Indian Language Transliterator (developed at IIIT Hyderabad, India) is a Mozilla Thunderbird Add-on, developed to enable Thunderbird users to compose and send messages in 10 Regional Indian Languages, using their regular QWERTY keyboard!!!

Rated 4 out of 5 stars (1)
32 users

Sensitivity Header Requires Restart

Implement the "Sensitivity" header for outgoing messages (described in RFC 4021 section 2.1.55).
This allows the user to select Private / Personal / Company-Confidential (or none) for an outgoing message.

Rated 4 out of 5 stars (1)
93 users

Diccionario de sinónimos ES Requires Restart

Adds to browser Spanish(ES) synonyms dictionary from package LibreOffice.

Rated 4 out of 5 stars (1)
142 users

Dooth Requires Restart

Dooth passphrase decryption

Rated 4 out of 5 stars (1)
1 user

Hyperactive

Scans hyperlinks in composed messages and alerts if one of the hyperlinks is broken.

Rated 4 out of 5 stars (1)
29 users

Add Search Engines for SeaMonkey Requires Restart

Add missing search-engine detection to SeaMonkey

Rated 4 out of 5 stars (1)
4 users

Gfire WebGame Detection Plugin Requires Restart

This extension tells Xfire and Gfire about the webgame you currently play.

Rated 4 out of 5 stars (1)
50 users

AutoSave Plus for ScrapBook Plus / XSidebar Requires Restart

AutoSave is an Add-On to the firefox extension ScrapBook Plus by haselnuss and ScrapBook with XSidebar for SeaMonkey. This is a modified version of the original Add-On. Uninstall the original AutoSave before you use this extension.

Rated 4 out of 5 stars (1)
51 users

Preferential (New GUID) Requires Restart

Advanced preferences manager for Mozilla-based...

Rated 3 out of 5 stars (5)
22 users

YouTube Videos Download in one click Requires Restart

Download YouTube videos by clicking a button underneath videos in YouTube. Save YouTube videos and songs in 1080p (HD) MP4 or FLV format.

Rated 2 out of 5 stars (18)
765 users