I use both FF and Chrome. Chrome is more heavy-duty, so I use it for Dedicated Browsing. I've set it such that when something calls me away and I close Chrome, the tabs will reopen so I can continue where I left off. But sometimes I'll be doing something in another program and need to look up something quickly. In such cases, I don't wanna wait while Chrome reopens 11 tabs so I'll use FF instead. My FF-tabs aren't saved between sessions, so I only see a single fresh tab when I open it.