does player v player stat work anymore?

I've been using Chrome for a few years, and since Chrome makes it EXTREMELY DIFFICULT to install user scripts to add-ons, I gave up hoping for the script written by Alan Hensel to show player vs. player statistics.

Well, since I just upgraded to Windows 10, I figured I'd give Firefox a look again.  I installed the Grease Monkey add on, and then installed Alan's script (available at his info page).  Nothing.  No change, and no player vs. player stats.

I used to like this feature, and hoped to get it working again.  Does it?  Do I need to tweak, or perhaps Alan needs to tweak??

(meow)