Hold down "Ctrl" and click a link to open it in a new tab. Make Firefox automatically switch to newly opened tabs by opening the "Options" window, clicking "Tabs," and then enabling the "When I ...

Sure, you can right-click on a link from Google's search results page to open it in a new tab, but that quickly grows tiresome. Instead, tell Google to open results in a new tab by default.

Safari doesn’t have any such setting in its preferences—there is an option to make Command-click open links in new tabs, and that works on links that open new windows.