in general this works. if you run gnome, then install the thunderbird- gnome-support package and configure your preferred browser in gnome preferred applications dialog.
if you are not on gnome use the preferences from https://bugs.edge.launchpad.net/ubuntu/+source/mozilla- thunderbird/+bug/363577/comments/14 ** Changed in: mozilla-thunderbird (Ubuntu) Status: Incomplete => Invalid -- Thunderbird hyperlinks don't launch browser https://bugs.launchpad.net/bugs/363577 You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs