Version: Developer edition 76.0b4 (64-bit) Problems started recently, when FF is started it hangs. It shows 4 process in the Task manager. I have to sort it in the memory utilization way, such that top is the highest memory consumer. Then I kill the last 3 to get it working back. Also the 4 processes of FF do not indicate "not responding" which is strange.

The killing of last 3 ff process and keeping 1 seems to fix the issue but it has to be done manually every time. Not sure what is making the FF hung in first place.