Extensions by Name
Addressbooks Synchronizer Requires Restart
Synchronizes selected addressbooks with other instances of thunderbird
using ftp/webdav/imap servers
AddressBookTab Requires Restart
It adds a button that can be put in toolbars and that open the addressbook in a new tab
addressContext Requires Restart
An extension to add addressbook-related options to the context...
AddressLabel Requires Restart
Create address labels from selected contacts in pdf, odt, ps or html.
1) Chose settings.
2) In the Address Book, select contacts and right click.
3) Print with "Actual Size" (not "Fit to Page").
AddTo Miru Directory Server Requires Restart
The AddTo extension allows Thunderbird users to add contact cards direct to a shared miru directory server. Once added contact details are available via LDAP for auto-complete and address book search...
Adhiyan Requires Restart
Adhiyan is a tool to convert and view TSCII/TUNE/TAB/TAM/DailyThanthi/Dinamani/Chenet/Kambar encoded Tamil content to UNICODE Tamil.
Live in harmony with ads.
AdSidebar is an alternative to traditional ad blocker extensions that benefits both the user and content creators. Ads are displayed in a sidebar on the right side of the screen.
Advanced Unread Folders Requires Restart
Adds a folder view showing unread folders, including their hierarchy. This is helpful if you have a lot of folders to make sure you don't miss an email, or if you are not happy with the existing unread folders view.
AdvancedTasks Requires Restart
Thunderbirds Lightning Extension: Allows the use of Markdown in Task descriptions and renders them as HTML in the TaskView.
After Unsent Mail Is Sent Requires Restart
Run a program of your choice after unsent mail has been sent.
AlertSwitch Requires Restart
Turn on/off the alert shown when new message arrives.
AlexPro for Thunderbird Requires Restart
AlexPro add-on per ThunderBird è un componente per l'archiviazione dei messaggi ricevuto o inviati nelle Pratiche AlexPro.
All mail from all accounts Requires Restart
Add a toolbar button to send and receive all mail from all accounts for Leopard theme.
Show all the menus in a single menu button that can be placed anywhere. Also contains replacement buttons for the default menus.
ALL To CC BCC Requires Restart
Allow Empty Subject Requires Restart
Allows Thunderbird to send message without a subject.
Visit my Allow Empty Subject site for recent versions and news.
Allow HTML Temp Requires Restart
This Add-on allows to have HTML temporarily allowed in the currently displayed message by only one click. When switching to another message, it'll be shown automatically again in plain text or simple html mode (if this is your default mode).