Returning to where you left off is the first step to address a concern where data is getting lost because people need to reference the underlying window. Here is the feature request for that. There is a timer which attempts to balance between this and your goal by returning to the “home” page if it has been a while since the extension was opened.
There is not currently a way to adjust this timer. Perhaps you could submit a feature request here on the community to either zero the timer (as you suggest, above), allow one to configure the timer, or to add a home button (as someone else suggested, but not as a feature request).