Honestly, this add-on is almost perfect, though I will say to preface that the only reason I'm making this review is that, just now, it stopped working for a bit until I manually reinstalled the add-on onto my browser. So I guess be careful if you're looking to transfer to another PC; anyway the main breadth of this review is really that it'd be a perfect way (regarding it being 5 stars) to counteract the stupid reasonings by the Bad Dragon company and their moderators if the add-on ALSO worked in reverse, and not just forwards? Otherwise, I find it perfect and doubly like that it also doesn't log the skipped posts in your browser's history, unlike how e621 handles blacklisted posts in the mobile version etc. I just wish that it could handle going backwards using the “Previous” button/the “A” key; which, actually, I also like that the WASD key shortcuts work with this add-on as well. Really gets rid of extra tedium!

Edit: Oh yeah, and another issue I have with the add-on is that it doesn't think of the case where if the post at the end of a pool/search result is blacklisted, it results in an endless loop of “sees post is blacklisted > goes to next post > hit last post in the queue which is also blacklisted > tries to skip that post but get redirected to it anyway > go back to step 1”. As well as the variant where the 2nd to last post isn't blacklisted, but you hit Next, and then it starts the loop. Essentially locking the tab by constantly refreshing the page and breaking the keyboard shortcuts. It's not a huge issue that warrants putting my review down to 3 stars since I feel the purpose of this add-on was supposed to be a quick fix, but it's an issue nonetheless!