Bug 774585 changed the way that GetCodebasePrincipal works (see https://bugzilla.mozilla.org/show_bug.cgi?id=774585#c0). Thunderbird uses GetCodebasePrincipal in 3 locations: /mail/components/newmailaccount/content/accountProvisioner.js line 46 -- var principal = ssm.getCodebasePrincipal(uri); /mail/components/aboutRedirector.js line 54 -- let principal = secMan.getCodebasePrincipal(aURI); /mail/test/mozmill/newmailaccount/test-newmailaccount.js line 1205 -- let principal = ssm.getCodebasePrincipal(uri); These need to be updated to fix Account Provisioner and our About Redirector. Cc'ing some SeaMonkey people, because I think suite is affected too.
(Note that this is part of what's causing all of our current Mozmill oranges on comm-central)
Landed fix with r=bustage-fix in comm-central as https://hg.mozilla.org/comm-central/rev/e3a1e30473f1 Again, you SeaMonkey folks might want to do something similar in suite.