Only IRC and mail are "input", I don't add text to the feed reader.
Anyway, this isn't relevant at all because the point is that I need to switch back and forth beetween applications quickly and easily.
Bookmarks: Whats the deal? You click on a symbol, get a list and choose one entry.
Same principle in both Fennec and MicroB. Except that in Fennec I guess I can't group bookmarks in folders, can't rename them, delete them... not so good. (And, as I think of it: The bookmarks-symbol can be made always visible in MicroB, but not in Fennec.)
Try to go back more than one page.
Scroll right beyond page [...] Settings: Clear menus in MicoB, somewhat ambiguous symbols in Fennec. Still, you always tap on a hotspot to activate the menu and - oh, no, wait a minute! In Fennec, you need to scroll past the edge of the page first. Very intuitive.
Over-all, I think MicroB's UI is superior to Fennec because it gets you where you want quickly and by using well-established patterns people are used to.
Fennec might look sexy
That's what I access the volume control for! And then I put it back on when the people are gone.