Another little Firefox add-on that I like for dealing with annoyances is
Active Stop Button. It doesn't do much but when you occasionally have some irritating blinking icon or other animated thing, it generally works to stop the animation.
I too tend to forget that the web even
has ads after using Adblock Plus for so long. I really should donate some money, it is the best. I don't mind a little bit of low-key advertising here and there but I am a grouchy curmudgeon when it comes to ads, and I actively avoid buying things that are heavily advertised. Which is kind of weird, because I'm not anti-shopping or anything like that, but something about in-your-face "our products am the bestest!!" ads really drive me nuts.