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 Desktop Packages, which is subscribed to firefox in Ubuntu. https://bugs.launchpad.net/bugs/975407 Title: AppArmor removing Citrix Plugin from Firefox Status in firefox package in Ubuntu: Won't Fix Bug description: I'm not sure if this is a bug or Apparmor just sucks. I installed Citrix reciever from here. https://www.citrix.com/English/ss/downloads/details.asp?downloadId=2316611&productId=1689163 It's have doen so several times and it works without a hitch. Until you enforce the generic Firefox profile. It then stops working and apparmor uninstalls the plugin without asking if you actually want it to uninstall it. Then I can never get the plugin reinstalled. Apparmor is blocking reinstall even after I purge apparmor from the system. To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/firefox/+bug/975407/+subscriptions -- Mailing list: https://launchpad.net/~desktop-packages Post to : desktop-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~desktop-packages More help : https://help.launchpad.net/ListHelp