I had the same behaviour after I installed epiphany, evolution opened links in epiphany instead of firefox, please recheck your Preferred Applications, somehow mine got set to 'Custom' (without me knowing that).
-- evolution ignoring preferred browser setting https://launchpad.net/bugs/22687 -- desktop-bugs mailing list desktop-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/desktop-bugs