Question Firefox ESR 60.6.3 picture freezing in youtube videos when viewed at 60fps

aor999

Honorable
Jun 28, 2017
157
5
10,595
I don't know what is the broad that suitable for my question, so I asking this here:
In the recent time, I've noticed that whatever I watching Youtube videos at 60fps in Firefox ESR 60.6.3, the picture would freeze non-stop, while the sound would continue playing.
In Pale Moon 28.5.0, this problem don't happens.
Why this is happening?