Hi people, I've deleted the .plist and refreshed firefox but still can't use keystrokes to open new tabs, new pages, minimize windows etc after exiting full-screen mode (not Yosemite's full-screen mode, but the one on the media player on the page). It only started recently but I think Firefox has updated twice since then but there has been no change to the problem even with new versions. If anyone has any tips that could help, it would be much appreciated. Cheers