I am going crazy as I have somehow lost the ability to copy and paste anything from a Firefox window or address bar into another document ie... email, word, text edit, atom—nothing. I have tried the About:config solution to no avail. Sometimes the copy and paste will work for a minute or so when opening Firefox, but it quickly degrades. I have looked into settings for the browser as well and I can't find anything that would affect copy and paste. This change seemed to have happen a few weeks ago with an update that was released. What is happening?!?!?!