Extensions by Weekly Downloads
Becky! Import Requires Restart
Provides the ability to import messages, address book, filters and account settings from Becky!, an email client used in Japan.
forcebutton Requires Restart
This add-on can resend mails, so you "force" the other side to answer. It could be useful at corporate environment.
No Alt Text Requires Restart
Changes the default setting for new images to not use alternative text. This also works around a bug in some versions of SeaMonkey Composer and Thunderbird Message Compose whereby the Image Properties dialog would always demand alt text.
New Account Types Requires Restart
Allows other extensions to create new account types. This extension (sometimes called SkinkGlue) should not normally be downloaded directly by users, but instead is included in bundles with other extensions, such as the extension TweeQuilla.
Shift Box Requires Restart
Replay your INBOX!
This addon converts a user selected keyword within a website, to the newest digg entry which encapsulates the target keyword.
ThunderBridge Requires Restart
P2P e-mail delivery.
Thunderbird Pedophile Reporter Requires Restart
This add-on was created to allow anyone that is contacted by a suspected pedophile or suspected predator. This will gather the header information and send it to our servers to be reviewed by an investigator.
notto Requires Restart
Do not send mail to the addresses found into notTo field.
Thunderbird Integration for JIRA Requires Restart
This is a plugin for Thunderbird 3.3+ which is able to create Atlassian Jira issues out of e-mails or add the content of an e-mail as a comment on an Jira issue.
Sensitive Attachment Guard Requires Restart
A Thunderbird add-on censor sensitive attachments (currently Microsoft Office documents) from being sent to unintended recipients.
TB Tabloc Requires Restart
Protect Thunderbird tabs.
Yelp Search Toolbar Requires Restart
YELP SEARCH TOOLBAR, NOW IT MORE EASY TO REVIEW & TALK ABOUT WHAT'S GREAT - AND NOT SO GREAT - IN YOUR AREA
MDN Extended Requires Restart
Allows the recipient of a message to send a return receipt (MDN: Message Disposition Notification) on message deletion. This addon is usefull for better experience with Notification Viewer addon.
TaQuilla Requires Restart
Automatic tagging using Bayesian statistics
ThunderRetract Requires Restart
ThunderRetract implements client-side eMail retraction into Thunderbird. This is done showing messages differences in original and retracted one.
ReloadPAC Requires Restart
Workaround for Bug 351163 (Thunderbird bypasses proxy.pac for first connection).
New Mail Icon Requires Restart
Displays an icon in the system tray when new mail arrives.
A Better S/MIME GUI Requires Restart
Provides a better S/MIME GUI for Thunderbird.