Not sure if this is a site bug or a Firefox thing, but figured I'd report it. Here's what happened just now
- favorited billysumday's Iran FPP.
- flagged billysumday's Iran FPP.
- favorited orville sash's Iran FPP.
- repeated favorite a couple of times to verify error.
- flagged orville sash's Iran FPP, which worked.
- favorited orville sash's Iran FPP, and this time it worked. It looks like whatever froze up favorites unclogged itself when I opened the dropdown, but I am not skilled enough in the ways of JS to know whether it's local or not. And obviously they were both "fantastic post" flags.