This works as expected here. It's more than likely a local configuration issue. Could you please attach the mimeTypes.rdf file from your Thunderbird profile, and also your ~/.local/share/applications/mimeapps.list.
Please use Apport when submitting Mozilla bugs in future (see https://wiki.ubuntu.com/MozillaTeam/Bugs). I generally close all bugs that aren't submitted in this way ** Changed in: thunderbird (Ubuntu) Importance: High => Low ** Changed in: thunderbird (Ubuntu) Milestone: ubuntu-13.04-feature-freeze => None -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1110348 Title: Thunderbird always uses Firefox to open links, also if the default browser is changed to Chromium To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/thunderbird/+bug/1110348/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs