I don't think that's it. It seems to happen pretty randomly. One second it's working fine, you check other tabs and even the number changes, so you look at the new post and when you go back to Live View it gets stuck on Loading. No real rhyme or reason when it comes back up either.
Current Firefox, standard array of spam blockers.
George Carlin wrote:
I think it’s the duty of the comedian to find out where the line is drawn and cross it deliberately.