Since the last update, pages will occasionally hang when loading. Looking at resource meter there are usually 2 FF sub-processes drawing out 60-90% of CPU. Closing then reopening tab of locked site causes the problem to repeat. Forcing a close, is the only solution, at which point, everything returns to normal, including the offending website that the previous session was hanging on.
This is occurring 2-3 times a day which is quite irritating because I usually just minimize the window to keep logins active.
