CompactHeader Requires Restart Nabarmenduak
Add symbol in header plane to switch between compact and expanded view. Options to switch between one or two lines compact view, which buttons should be displayed in header pane. For Thunderbird 36 and older use version 2.0.9 (see version history)
Mail Redirect Requires Restart Nabarmenduak
Allow to redirect (a.k.a. "remail") mail messages to other recipients.
OpenPGP message encryption and authentication for Thunderbird and SeaMonkey.
Mail Merge Requires Restart Nabarmenduak
Mass Mail and Personal Mail