Recently Updated Extensions
This addon estimates the number of links in a target page.
New Mail Icon Requires Restart
Displays an icon in the system tray when new mail arrives.
DeleteSimilar Requires Restart
Auto-delete similar newer incoming RSS messages.
No GUI (Hands free). To make it work you just rename the RSS folder to start with a minus.
i.e. Google News to -Google News
Uses Trash. Keeps oldest message to preserve Read status.
WebChanges Requires Restart
Monitor website changes for all websites not providing feeds.
S/MIME Security for Multiple Identities Requires Restart
Adds S/MIME Security configuration to the multiple identities dialog.
Meanwhile this feater has been integrated into Thunderbird 3
MuteThread Requires Restart
For a long time, Thunderbird has supported ignoring threads in newsgroups. This is a prototype that explores bringing that functionality to email.
CantoFish Requires Restart
CantoFish is a popup Cantonese-English dictionary for Firefox. It contains over 200,000 entries and works with both traditional and simplified Chinese characters. The Yale and Jyutping romanization systems are supported, as well as Mandarin pinyin.
Splash! (Compatibility Update) Requires Restart
Adds a splash screen. Supported in Firefox, Flock, Thunderbird, Sunbird, eMusic Remote, Songbird and Sunbird.
arXiv Requires Restart
Adds direct links to the article PDF and BibTeX information to arXiv email listings. BibTeX information can be used in reference managers such as JabRef by Copy & Paste.
about:support Requires Restart
A Mozilla Messaging addon to assist in product support.
ThunderRetract Requires Restart
ThunderRetract implements client-side eMail retraction into Thunderbird. This is done showing messages differences in original and retracted one.
EzStylist Requires Restart
Allows including CSS when composing e-mails.
Markov Dictionary Switcher Requires Restart
Based on Dictionary Switcher but more than a thousand times faster and you can choose dictionaries that you want to use. Detects the language of the message that you are composing and changes the spelling dictionary.
JSON Calendar Provider Requires Restart
JSON based calendar Provider - designed to make writing backends for calendars trivial
Been2Long Requires Restart
Been2Long will remind you to get in touch with your contacts.
FG Printers Requires Restart
This extension allows you to modify the printing output of Mozilla Calendar. You can change the font, font-sizes and display of colors. Plus category colors are actually printed and end date calculation now works!
A Better S/MIME GUI Requires Restart
Provides a better S/MIME GUI for Thunderbird.
Menu Editor II Requires Restart
Hides or moves menus and menu items. (Deprecated version, see below.)