Cannot manage Quarantine from Firefox

[Multiverse]

Very odd problem... I use firefox as my default browser and when I click the quarantine link, the page loads fine. BUT, I cannot check any boxes or click any buttons. At first this was only happening on once computer. But it just started happening on a second. (a third and fourth work just fine). If I copy the quarantine URL to IE, Edge, or Chrome, it works fine. I just cleared EVERYTHING from the cache (using the Firefox "standard" procedure to do so) and that made no difference. InPrivate browser also made no difference. I don't THINK this is actually a problem with Untangle, but every other website works fine and I'm hoping someone else has experienced this and knows an answer.

Win10, Firefox 53.03 with Untangle 12.2.1 (No Upgrades available).

[jcoffin]

Open the Firefox console F12 and see if there are any errors.