FYI, I use Firefox as my primary browser. Sometime during the last few days, the editing toolbar that allows users to select font, size, insert links, etc. disappeared. I can't do any of those things anymore in Firefox. They are present and usable if I open BigSoccer in Windows Explorer, however. Is there a fix? Larry
Problem still exists. FWIW, I also have a similar problem on a different website. I cannot see the "Chalkboard" analysis on this page http://matchcenter.mlssoccer.com/matchcenter/2016-09-07-real-salt-lake-vs-la-galaxy/boxscore when I use Firefox, but can always see it when using Internet Explorer.
I have a hazy memory of a similar experience. I don't remember the exact problem, but I do remember the general problem: it was a FF extension. Disable one extension at a time, and see if you don't find one that's the culprit. My guess is that it would be an adblocker or something like noscript.
Let's see if we can figure out what the issue is... What version of FF are you running? Are the plugins up to date? Here's what I see in Chrome - how is your view different?