Its just like when KDE saves the programs that I have open so the same programs open up again when I restart KDE. Its a convenience thing. If I am going to spend the time opening up all the same programs/tabs again then I am going to be annoyed that they were all closed at the end of my last session. There are quite a few pages that I like to visit/refresh on a regular basis, including slashdot, and I wouldn't want to have to open up everything again every time the browser opens. Yes, there is a performance hit on startup but I take that as a small price to pay for everything just being there. Also, I keep open stuff that I deem not quite worthy of bookmarks that I still would like to see again. Kind of an, oh yeah, reminder that I have something to do associated with it. These things would be lost and I wouldn't likely remember them again. I realize that I could be bookmarking groups of tabs, but I like this better. You can still do that right?