As far as I know, there is no way to do that. However, the tabs are really easy to close, if you feel the need.

 

Yeah, I can't think of a way to stop that. That sort of behavior is usually determined by the webpage by using target="_blank" or whatever in the link.

 

I seem to have an infinite number of tabs open. But unlike windows chrome, it doesn't hog every scrap of memory it can find.