Add-ons

Mail Redirect by Onno Ekker, Pawel Krzesniak

Allow to redirect (a.k.a. "remail") mail messages to other recipients.

Signature Switch by Achim Seufert

Switch the signature on/off or choose a new one from your predefined set.

Addressbooks Synchronizer by Günter Gersdorf

Synchronizes selected addressbooks with other instances of thunderbird
using local files, webdav servers or imap servers

Bluhell Firewall by Diego Casorran

Get a faster browsing experience by blocking nasty web resources using Bluhell Firewall, the lightweight Ad-Blocker and Tracking/Privacy Protector.

ThunderBrowse by GS! Networks

Did your friend send you a cool link? Want to read the rest of that interesting article? Don't want to open up your web browser just to view it? You don't have to! Just view it in Thunderbird with ThunderBrowse!

Auto Address Cleaner by markopee

Removes comment, display name automatically from addresses before sending mail.

Google Privacy by Herrminator

Make some popular websites respect your privacy settings.
Please see the known issues below!

Custom Address Sidebar by shimamu

Allow you to help address sidebar more useful.

Flexible Identity by Paul Kolomiets

Selects an identity based on the recipients list when sending an email

Animated Christmas In Fantasy Land by Poppy

Everyone Loves Snoopy by Connie