I do not use FF at all - as Richard said, there are quite a few TAPs that will do the skip and you can set the duration. I do 30 seconds forward 15 seconds back, so if one of the 30 seconds takes it over the end of the adverts, 15 seconds back usually puts it just where I want it. FF, even if fast, is a pain. With my Fusion it was extremely fast, but I still used skip.