Maybe I'll try it for Firefox on the old XP. From what little I've read, the desirable lightness of Bluhell balances with good performance. "Bluhell". It sounds kind of like a tattoo someone from a tough mototcycle gang might like to wear! Small yet fierce!
IMO its not great. Blocks ads but leaves the placeholder. So you see spaces all over the page. Also sometimes the pages get disorganized because of blank white spaces. Does not block all the ads.