Public bug reported: Happens with Human, Tangerine, and Tango.
Looks like it might be the same issue as bug #64472 ** Affects: firefox-themes-ubuntu (Ubuntu) Importance: Undecided Status: Unconfirmed -- Address Bar lock icon vanishes on mouse over https://launchpad.net/bugs/70516 -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs