Extensions by Name
Upload large attachments to your Cloud and send the link by email
.vcs Support Requires Restart
Import and export calendar files in vCalendar (.vcs) format
Look up Japanese words with the hover of a mouse.
After enabling the add-on from the toolbar (or press Alt+R) simply hover over Japanese text and a popup displays corresponding dictionary definitions.
3e Calendar Requires Restart
Adds support for 3e calendars
This add-on mimics the mentions behavior on Outlook when mentioning a contact with the '@' sign. The contact selected is added as a link in the email body as well as to the recipent list of the email.
A Better S/MIME GUI Requires Restart
Provides a better S/MIME GUI for Thunderbird.
AastraClickToCall Requires Restart
Converts telephone numbers into clickable links for use with Aastra IP Phones
Enables theming of the About:Home page by providing a simple redirect
Displays startup timings
A button that lists all the about pages that exist. Some of these pages are also provided as separate buttons.
Open about:config to change hidden settings that cannot be edited from the Options window. All Mozilla based programs have settings that can not be changed in the options window.
about:kittens Requires Restart
Baby cats and kittens in the about box...
about:support Requires Restart
A Mozilla Messaging addon to assist in product support.
AboutConfig Requires Restart
Account Colors Requires Restart
Associates user-defined colors with POP3/IMAP accounts and identities. Applies these colors to accounts, identities, folders, message list, message headers and compose headers. Users will always know which accounts/identities they are working with.
Account Manager Toolbar Button Requires Restart
accountex Requires Restart
Export/Import Account Settings.....
Update 2023: This addon will be replaced by "arcus".
Modern encryption in Thunderbird
** Currently in testing phase **
What you can do:
1. Set your secret key and automatically decrypt emails
2. Generate a new key pair
3. Encrypt plain text
Add Birthdays To Calendar Requires Restart
Birthdays from addressbook-contacts will be added as events to Lightning...
Use @ to mention somebody on an email to link and add to the CC.