This presentation, one of many to have appeared online over the past months, showcases Firefox 3′s impressive multi-tasking address bar. Though now it’s so much more than an address bar, hence the “awesome bar” moniker.
I particularly like the one-click add to favourites button and ability to sort through and tag anything you think is worth keeping. I imagine there’ll be a del.icio.us extension soon (if there isn’t already) which will integrate sharing features and allow you to keep all your bookmarks in one place.
Foxmarks currently does something similar, but I would appreciate an add-on which allows you to import your current del.icio.us bookmarks into Firefox (and vice versa).