It’s either tab crash or whole browser crash. Sometimes it may be about 10 crashes (tab+browser) in a day. Browser update doesn’t help – so it’s either a bug developers don’t give a damn or problem is not related to the browser.

Hey folks! Do you remember me? Now I work on new computer and there was not a single Firefox crash for 12 days. Meanwhile. I had 3-5 crashes every day on old computer. So it was hardware-related problem. But I don’t know what problem.