You can edit the userContent.css file yourself to block those. You can find it at /home/user/.mozilla/microb/chrome/userContent.css. Once you find some formulas that block them, send them over to me and I'll add it in an update for the package.

Also, if/when I get around to adding hosts-based blocking on top of the CSS, it should be a lot better.

I'll be putting out another update tonight that incorporates a lot more rules into the CSS file which should block a lot more ads. Hopefully enough to not need hosts-based blocking... I just hope it's not too much and microb starts slowing down.