Search results keyboard shortcuts от Teemu Karppinen

Navigate google search results without needing to touch your mouse! Hit alt+1 to move to the first result, alt+2 to the second and so on. The navigation logic dodges adds and suggestion boxes, only navigating to the links you actually care about.

The solution is opensource software. Source code can be viewed (and contributed to!) at https://github.com/Temetias/result-shortcuts