All this "we make the world a better place" is actually the most annoying thing for me as a user. Every time I open Firefox (not so often anymore), I get some "save the world"-spam on the frontpage.
Either way I'm going to settings and making it reopen the tabs I last had open.
Edit: Out of curiosity, I checked to see my defaults and the Homepage is still apple.com. However, the "opens with" settings are set to Favorites (top of the list, probably the default) which explains why it opens with a blank page. So the change was probably whenever they added the Favorites page feature; most likely to compete with Chrome/Firefox/Opera/etc.
#firstworldproblems