sudo update-alternatives --config x-www-browser (or its www-x-browser) either way you set FF as default there and thunderbird will use it this is not a bug. i am going to close this now thank you for your report. If this does not fix it please re-open this bug.
** Changed in: mozilla-thunderbird (Ubuntu) Status: Unconfirmed => Rejected -- Thunderbird uses konqueror as web browser https://launchpad.net/bugs/52670 -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs