ThunderStats! Your Thunderbird Statistics! Requires Restart
Do you remember the old good Eudora statistics? Do you miss them?
Using this addon you can finally keep an eye on how you use your beloved Thunderbird!
PrintingTools Requires Restart
Adds some options to print messages and addressbooks
Google Calendar Tab Requires Restart
Adds the Google Calendar web interface as a new tab directly into Thunderbird. Creating and viewing events works just as it would in a browser like Firefox
Provider for Google Calendar Requires Restart
Allows bidirectional access to Google Calendar
tasks & mails Requires Restart
Tasks and emails management in a Thunderbird extension. tasks are stored in emails folder and it's possible to link an email to a task.
See all in one, emails and tasks (no more pain to synchronize a task manager).
Calendar Tweaks Requires Restart
Allows several tweaks to the Thunderbird/Lightning calendar user interface including new selection styles and repeating event icons. Mimics the colors and styles found in MS Outlook.
Lightning Nightly Updater (Unofficial) Requires Restart
Quickly get to the latest nightly build of Lightning relevant to the version of Thunderbird and the OS you're on.
Adds profile folder/directory button.
Disable DragAndDrop (Thunderbird) Requires Restart
A Thunderbird extension which disables drag and drop in the folder pane.
This extension prevents unintended folder movement.
ImportExportTools Requires Restart
Adds some tools to import and export folders and messages
BlunderDelay Requires Restart
Thunderbird Extension: AutoSend Unsent Messages. Flushes entire outbox at regular intervals.
Bird Import Requires Restart
The extension allows to import e-mail messages from The Bat! mail client into Thunderbird.
Folder Filters Button Requires Restart
Just a very simple add-on that adds a toolbar button to execute the "Run Filters on Folders" from Tools menu.
LightningButton Requires Restart
Toolbar-Buttons for Lightning; advances the feature to get rid of the tabbar.
SmtpSelect Requires Restart
A toolbar button providing easy access to choosing the default SMTP server in Thunderbird.
.vcs Support Requires Restart
Import and export calendar files in vCalendar (.vcs) format
Lightning Month Tabs Requires Restart
This addon adds month tabs into Lightning calendar month view
Use Bcc Instead Requires Restart
Who among us has not made the mistake of sending a 'broadcast' email to a large number of recipients without using BCC; thereby revealing everyone's email addresses to all? This simple add-on attempts to prevent this from occurring.
Clean Subject Requires Restart
"Clean Subject" cleans the subject from multiple occurrences of subject prefixes such as ("Re: Re-2: Re:") and postfixes that are inserted by other clients. Words like "[SPAM]" can be cleaned as well. These prefixes can be defined in the preferences.
Always HTML Requires Restart
Disable automatic degradation of HMTL mails to plain-text mails.