Most Popular Extensions
Random Theme Switcher Requires Restart
This extension switches your themes at random.
Copy Link Name for Thunderbird Requires Restart
It's like Copy Link Name for Firefox but for Thunderbird!
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...
PONG! Multiplayer Requires Restart
Play a game of PONG! while you are waiting.
Check Attachment before Send Requires Restart
Confirms to send a mail with any attachment.
Sets the spell check dictionary based on the first recipient
pass-manager Requires Restart
Replace integrated password managers storage with zx2c4's pass (www.passwordstore.org)
Mutt Keys Requires Restart
Creates Mutt like key bindings for Thunderbird. Inspired by the mouseless extension.
privateID Requires Restart
This extension displays a warning if you send a message from your private emailID to an address/ mailing list which is not found in your Personal Address Book...
EuropeanMX Spam Reporter Requires Restart
Train your EuropeanMX filter by reporting unrecognized spam or false-positives back to us.
Soapy Requires Restart
Bypasses DNS-based censorship
NOTE: This was created as a SOPA protest in 2012. This does not work anymore for most sites. Use Tor instead.
Mail Sent Notifier Requires Restart
Allows to notify a HTTP-GET based webservice after successfully sent an email, e.g. for time registration systems.
Limit_Offline_Message_Size Button Requires Restart
Limit the size of a message to download with a single click of the button for slow (and/or expensive) network connection.
Quick access to Tools->Account Settings->Disc Space->"To save disk space, do not download: Messages larger than XXkB"
Edit HTML Source Requires Restart
You can now edit the HTML source in the Compose...
Resubmit Requires Restart
(Re)submit multiple messages to a predefined recipient(s)
ePhotoUploader Requires Restart
ePhoto Uploader is a Mozilla/Firefox addon to allow you to upload any image on websites you're browsing to your ePhotoBay account by just one click. For the addon to work a free ePhotoBay account is required.
Run Filters on Folder button Requires Restart
A 'Run Filters on Folder' toolbar button. Based on http://developer.mozilla.org/en/docs/Custom_Toolbar_But...
Kmaleon Extension Requires Restart
Con esta extensión podrás hacer una copia de tus emails en el programa kmaleon.
gTimer Requires Restart
gTimer предназначен для подсчёта времени, проводимого за работой в Firefox.