User blog comment:DaNASCAT/Technical Update: March 20, 2012/@comment-1513877-20120324033637/@comment-3441771-20120327062929

Okay, to expand on what I said since I explained it terribly: Obviously -moz- is still being used by FF. I'm now wondering (without looking) whether Wikia's coded the page differently for FF than other browsers. Would explain the -moz- tags.

PS Obviously my test worked. :)