FF 58 not using gpu

[smaksss]

Hello.
FF 58.0.1 x32 not using gpu in video playing, but FF 56.0 x32 use good. Why? How Fix?
PS Videocard: GTX 750TI, NVidia driver ver.: 390.77

[Reflective]

Have you configured the Nvidia GPU properly i.e. in the control panel? It should look something like this: https://imgur.com/a/9ynu2

[smaksss]

In my control panel of NVidia haven't item "2. Select the preferred...", but all options I choise to "Application controlled" for FF58, where it has. Is not helped.

[smaksss]

So, problem been in profile settings. I'm copy profile from FF56 to FF58 and GPU now work.

[smaksss]

Specifically in the setting "Use hardware acceleration when available" in general options of the browser. I turned it off, because I thought that it only applied to the CPU, and for GPU I watched option "media.gpu-process-decoder" in config. It's my error.
Sorry for the trouble.