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

How to Open a New Tab in Safari While Clicking on Something. Tabs allow you to simultaneously open numerous Web pages in Safari without cluttering your taskbar with multiple Safari windows.

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.