I can't set up which sites it should block.
By default, it's not blocking any of the sites I don't want in my history (mostly booru stuff) and I can't seem to be able to add those on some kind of list of any sort in the extension's settings.
Add such feature and then it might be one of the best history removers out there.

I didn't add this since i don't need this but i definitely applaud your honesty - CLAP!!! CLAP!!! HA!! HA!!