No, It appears to be random on my laptop. Moreover, I tried to reproduce the problem I encountered but had no luck.
Viewing post in Posey Picks and the Bus Stop comments
I might have a clue: My laptop doesn't have much RAM(8 GB), so it's often low on memory. I ran the game, followed by using up almost all free RAM, and soon the game stuck. The version of Firefox was 81.0.
Maybe the quickest way to solve the problem is to close other programs and browser tabs before playing.