This is a pretty old bug, but it looks similar to what you're describing: https://bugzilla.mozilla.org/show_bug.cgi?id=832956.
Can you maybe comment there to explain your problem, and see if it gets some attention upstream? ** Bug watch added: Mozilla Bugzilla #832956 https://bugzilla.mozilla.org/show_bug.cgi?id=832956 ** Also affects: firefox via https://bugzilla.mozilla.org/show_bug.cgi?id=832956 Importance: Unknown Status: Unknown -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1915605 Title: Firefox (circle spinning while run program) problem on Ubuntu bionic family - 18.04.5 To manage notifications about this bug go to: https://bugs.launchpad.net/firefox/+bug/1915605/+subscriptions -- ubuntu-bugs mailing list [email protected] https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
