Most Popular Extensions
Mutt Keys Requires Restart
Creates Mutt like key bindings for Thunderbird. Inspired by the mouseless extension.
FlatStyle for Thunderbird Requires Restart
This gives you a style similar to MS Office XP in your Thunderbird menus and toolbars, and Calendar as well if you have that installed. It also changes the category-selector in the options window to use your system colors, instead of always being...
After Unsent Mail Is Sent Requires Restart
Run a program of your choice after unsent mail has been sent.
Mail Sent Notifier Requires Restart
Allows to notify a HTTP-GET based webservice after successfully sent an email, e.g. for time registration systems.
Last Message Requires Restart
Navigate the folder to the last message in the moment the folder is opened.
Posting Style Enforcer Requires Restart
Automatically converts top-posted messages to use bottom-positng or vice versa. Interleaved posts are left alone. Detects automatically added text and supports a per-contact list of exceptions.
AWN Unread Count Requires Restart
Displays the number of unread messages in the Thunderbird AWN dock icon.
Show SMTP Username Requires Restart
Displays username (if available) next to SMTP...
Check Attachment before Send Requires Restart
Confirms to send a mail with any attachment.
gTimer Requires Restart
gTimer предназначен для подсчёта времени, проводимого за работой в Firefox.
Rikaichan Japanese-Hungarian Dictionary File Requires Restart
This is a dictionary file add-on for the Rikaichan extension.
Sets the spell check dictionary based on the first recipient
BccInfo Requires Restart
Send any additional information to your BCC recipient.
Block unwanted ads.
Resubmit Requires Restart
(Re)submit multiple messages to a predefined recipient(s)
rmIncomingDups Requires Restart
rmIncomingDups is a Thunderbird extension that checks if there are duplicate messages across accounts.
When a new mail arrives rmIncomingDups checks according to the rules configured if it finds some duplicates and removes them.
Filter SubFolders Requires Restart
Applies mail filters to sub folders of an IMAP account, not just the Inbox
Cat Attack Quick Button Requires Restart
Easily visit the site for The Cat Attack Fishing Tournament.
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.