Not that I know of, but there is a website called archive.org that's really cool IMO. You can type in any website and it'll bring up a list of times it was screenshotted(?) and you can see what it looked like then. You can see what yahoo looked like in 1996, for example!
FF is hard though because alot of the sub pages and individual threads didn't get screenshots because I don't think it allows the crawling robot things to pry around like that
I had better luck last year getting on individual threads, but when I tried again yesterday I got alot of dead ends, which was disappointed. Especially around 2003-4 when the front page was different.