Nice add-on.
Any way to get the pages you have already visited change color? The Meme thread is one of my favorites, but some days there may be a single post, sometimes a lot. I usually start at the last page I was on. Not a big deal with 13 pages, but when it gets to a couple hundred, might help.
Also helpful when trying to find the post you looked at yesterday, don't remember the title, but it is now 3 pages down.