@asdasdasdasdas I’m going to link you to two different replies from me. Kind of long, but if you can check it all out and respond with results, it would help. Other thing, if you’re saying it shuts down, do you mean your browser or PC? If browser, I’m assuming it’s a crash. So you should be able to go to brave://crashes, make sure report is submitted (by hitting Send Now and then restarting your browser), and then share the Uploaded crash report ID.
To give the explanation on some of what I am asking in that above link:
My assumption based on what you’re explaining is you do have something uses up a lot of memory or CPU. Big thing to figure out is what’s causing it. So going through a lot of the basic troubleshooting or kind of messing with settings can help figure it out.