When a video plays, it will be laggy for a few seconds, the came back normal. Sometimes it doesn't recover from it. This happened almost everytime for the Firefox 124.2 version, seems like it has a frame rate cap. As I installed the Firefox 122.0 version, it only appears a few times a moment, but still face a small chance to occur. Phone specs: Vivo v21e Funtouch OS 12 Android version 12