Diễn đàn hỗ trợ Tất cả sản phẩm

Whenever I watch videos using Firefox going to Youtube sometimes bugs out like the loading takes forever. Like the video is playing and yet the surrounding of it is just pitched black, and once it load properly the video will stop and the whole site will finally be done loading and goes back playing the video.

I've tried other browser it doesnt seem to be affecting only Firefox can someone looked into this. Cause it definitely not my internet.