I started using Brave Version 1.20.110 Chromium: 88.0.4324.192 (Official Build) (64-bit) a few days back.
It turned out to be much faster than CHROME. However, it has started freezing when the browser is left idle for some time. It does not matter if 4-5 or 20-30 windows are open. It does the same.
CHROME only had issues with slowing down especially on gmail and youtube but never froze.
Unfortunately, I am considering going back to Brave if the issue remains.
I am using Windows 8.1 64B and there are no issues with my PC temperature. It is in top shape.