Haven't seen this since upgrading to 18.04, and can't reproduce it following the instructions anymore either, so it appears to be fixed.
** Changed in: firefox (Ubuntu) Status: New => Fix Released ** Summary changed: - In Firefox 57 (Quantum), HTML links' context menu appears in the wrong place + HTML links' context menu appears in the wrong place (since Firefox 57 Quantum) -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1733908 Title: HTML links' context menu appears in the wrong place (since Firefox 57 Quantum) To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/firefox/+bug/1733908/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs