@chermany4ever You can't configure much in Thorium's Settings to improve its performance and running behaviour under Windows XP. What I actually meant was to change other things like updating the Chrome XP API Adapter, disabling animations and media autoplay, using a mobile user agent, setting suitable internal and external flags and so on. I did that, and now, this browser is running much better than before.
PS: Also very important is a well-configured content blocker. Yesterday, I had to buy some articles on Amazon. Among other browsers, I also tested this website in Thorium. If uBlock Origin is not well-configured, the Amazon website does not load that fluently as it should. At the moment, I use uBlock Origin Lite as it consumes far fewer resources in Thorium and seems to be better suited to this browser.