Great, basic tips for why so many of us love firefox so much! Every time I do a workshop, I teach about tabbed browsing - you won't believe how many people don't know about it and it is one of the most useful things out there. Don't get so caught up in learning YOUR new thing that you neglect sharing something that could be someone else's most useful new thing!
Intuitive feed readers - now that is fascinating in potential but also scary in that perhaps, they could be manipulated (much like our searches are manipulated.) Fascinated and yet curious at the same time.