Thanks for your reply, I'll now close this bug report. Marking as "Invalid" as reporter no longer has the means to reproduce the reported issue.
** Changed in: firefox (Ubuntu) Status: Incomplete => Invalid -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1547768 Title: firefox buttons stop working after installing the uBlock Origin add-on To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/firefox/+bug/1547768/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs