This happens to me as well. I too have two monitors, and sometimes the menu is even on the wrong monitor. Oddly enough, if I click off then right-click again (right away), the menu appears correctly. It's almost as if it is triggered by not being invoked after x amount of time.
-- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1780790 Title: Menus, tooltips and dropdowns are often misplaced on screen To manage notifications about this bug go to: https://bugs.launchpad.net/firefox/+bug/1780790/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs