In Windows 7, let's say I'm viewing a web page, then open or restore some number of other applications. Is there a quick way to then to get focus back to the Firefox tab I last was viewing (it's now buried under many other things on my desktop)? If I select the Firefox icon on the task bar, I get a list of open tabs, where the tab I was viewing may or may not even be displayed (and the list is very long to scan through anyway). Perhaps an enhancement is desirable to show tab groups from the task bar (plus last-viewed tab and pinned app tabs) as an alternative to showing all tabs?

A similar use case is navigating from one tab to another tab in a different tab group. How do you get back quickly to the last-viewed tab? How about adding the ability to navigate through viewed tabs in viewed order (a view history navigator)?