Simply put, the little gear at the bottom right of the YouTube player doesn't work when I'm signed in. It seems to work when I'm signed out of YouTube, but when I click when signed in it just does nothing. On Chrome I don't have this issue. Yes I have cleared cookies and cache data, restarted with Add-ons disabled, cleared Cookies and Site Data (by clicking the "i" at the left of the address bar and clicking "Clear Cookies and Site Data..."), refreshed Firefox, nothing has worked, and it's quite frustrating.