I just found out that atleast on my laptop this always seams to happen when i am searching the content of a page, and the focuse is on the last instance of the word on the page, when i then hit next and the focuse moves to the first instance on the page i loos the UI, if i then press next again the UI returns.
-- Missing UI in firefox https://bugs.launchpad.net/bugs/462609 You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs