Dropped Frames in Firefox on YouTube after upgrading from Wi

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Joined: January 12th, 2020, 10:38 am

Post Posted January 12th, 2020, 10:49 am

Dropped Frames in Firefox on YouTube after upgrading from Windows 7 to Windows 10

I've upgraded from Windows 7 Ultimate 64 bit (installed on my SSD) to Windows 10 Pro 64 bit.
Since then, I've dropped frames on YouTube at 2K@60 (VP9 308) and at 4K@24/25/30 (VP9 313).
I used to play them smoothly without any frame lose in Windows 7.
I've 1080p monitor, but I prefer to play higher res, because of the video quality is much better (higher bitrate).
Tried enabling/disabling WebRender, WebGL, Hardware Acceleration. Tried Firefox Portable, older version an reinstalling Firefox. Nothing Works...
I've the latest Nvidia drivers, and the latest Firefox version.

Sample videos:
2K @ 60 (4K @ 60 is too much for my machine.
4K @ 24

I can play them in VLC (in the same res) without frame lost in Windows 10, but not on Firefox...
I have another HDD with Windows 7 Ultimate 64 bit and latest Nvidia drivers, and these videos play smoothly in Firefox without a single frame lost.

My Specs:
i5-750 @ 2.67 (stock)
8GB RAM DDR3 1333Mhz Dual-Channel
GA-P55-USB3 MotherBoard
Kingston A400 SSD 240GB


PS, Please change "How many letters in Mozilla?" to "How many different letters in Mozilla?". I tired "7" and then "seven", then I figured out the answer supposed to be "6". I guess I'm not the only one.

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