mně se k témuž účelu osvědčil ještě víc userscript "Google Ctrl-Arrow" http://userscripts.org/scripts/show/6575 (chová se trochu jinak, je nastavitelnej, funguje na image searchi …)

Hotkeys:

Ctrl-F1
Show/hide this help
Ctrl-Space
Toggle Tab mode: open links in a new or current tab
Ctrl-SingleQuote
Toggle navigation mode (toggle select input fields with Up/Down keys)
Up / Down
Move cursor to the previous / next results entry
Ctrl-Left / Right
Go to the previous / next search results page
Ctrl-Up
Set focus to the input query
Ctrl-Down
Release focus or move cursor to the next results entry
Esc
Release focus and activate current entry
Return
Open current link in a new or current tab (if no other element has focus)
Alt-Return
Submit current search (top input) if input query is not focused