procrastistamper

Mine also stopped working, I had used the fixes previously for when it stopped working at version 52. So, I came back here to try to the Primetime manual install and I got stuck at the same place as DrWho3000. It was still sitting on "...will be installed shortly". HOWEVER, I set updates to Off, set the pref to this suggested by roytam1: media.gmp-manager.url aus5.mozilla.org/update/3/GMP/51.0/20170413192749/WINNT_x86-msvc-x86/en-US/release/Windows_NT%205.1/default/default/update.xml Then went back to Add-Ons and clicked on Check for Updates, and it installed :-) I'm good for YouTube videos, but I was good there, anyway...at least they were playing and I didn't notice a problem. The problem that brought me back here was that Facebook videos were not playing for me (one of my own livestreams). I still don't have that working right for some reason.