Starting firefox via clicking on a link in thunderbird prevents firefox from using saved passwords as well.
In short, when starting firefox via thunderbird it's somehow severly crippled and barely usable... -- Opening firefox by clicking on links in thunderbird breaks https https://launchpad.net/bugs/57923 -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs