When using google chrome, the chrome window dims after a while, what should I do?

Question

Google Chrome

Every 40 seconds, the chrome crashes and the blue at the top fades, just like if you open another program on top of chrome in a small window. if you watch a video in full screen, then it decreases to normal mode, but chrome still crashes, watching movies and just surfing is very inconvenient, what should I do? By the way, in the Yandex browser, the same thing, what to do, how tired it is !!!