Control over separate browser tabs?

I'm trying out the forum features, in eval mode.

One thing I noticed is that when I get a list of today's posts, and then click on one of those, it's launching in a separate browser tab (I'm using firefox at the moment). 

Do we have control over this? I would prefer that nearly all activities the user does stays in the same browser window.  I know that starting a new thread loads a separate editor window, I'm okay with that.  (Control over that too perhaps?).

If there is already some documentation on this, feel free to point me there.

TIA, Bob.