To focus the search field in the browser chrome:
- hit Ctrl+k in Firefox 2.0
- hit Ctrl+e in IE7
I love consistency . See also my gripes about tab switching.
Btw, the Yahoo! live search in Firefox is pretty cool. I don’t think there is a shortcut to focus the search box in the Yahoo! toolbar.
The always useful F6 is another great one to know. And try F11 is you don’t know that one. And obviously Alt+left arrow (who needs backspace!?!) and Alt+right arrow.