For most sites its perfect, but on Facebook it has issues. Its like they tried to set it to block the suggested for you posts and feed ads, but its not working properly. The posts still show but glitch flick through multiple at random before something gets through. And on the left side of the page after this glitch occurs there's text like "learn more", "xx days ago" "sponsored" etc. This only happens with uBo on firefox, Edge is working properly. I'd rather the suggested posts show than have this glitch, especially when a post/meme I actually would like gets gobbled up. When it comes to ads, what I find intrusive is stuff that overlays/obscures/plays before or interrupts the media I'm watching, not really the suggested posts or posts from online stores I'm actively following.