Sound in Browser (Firefox) Kali Linux not working, why?

Question

linux

It works in other applications, system sounds are also turned on. I even installed flash player. However, in the player of the same VK, the audio recording, when you try to turn it on, starts skipping sharply, switching to the next one and the audio recording after 5 VK gives an error. YouTube also shows a picture, but there is no sound. I already fucked up (fucking linux). Googled for 24 hours, didn't google anything

Answer 1

It was enough to restart the computer after installing the flash player