I'd rather they just let the social bookmarking sites and tools take care of bookmarking, and concentrate on core feature that Firefox is still missing - like default email handling. Instead, we get this:
Many of its new features concern bookmarks, an area typically slow to change in the browsing world. You can now add keywords, or tags, to sort bookmarks by topic. And a new 'Places' feature lets you quickly access sites you recently bookmarked or tagged and pages you visit frequently but haven't bookmarked.