Plugins like this have been removed by Mozilla from Firefox since March 2017. https://developer.mozilla.org/en-US/docs/Plugins/Roadmap
** Changed in: firefox (Ubuntu) Status: New => Won't Fix -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/975407 Title: AppArmor removing Citrix Plugin from Firefox To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/firefox/+bug/975407/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs