Sure, if the thread page is long enough to take you past all the navigation widgets (unless you have them all minimised), so that you don't need to do any scrolling. However, in most cases you'll be either scrolling up or down anyway. Plus, I assume since you play SC2 that you have two hands, which can perform almost simultaneous functions. Home+click can be done in a tenth of a second.
I still don't understand why you wouldn't just Ctrl+Click each thread off the main page when you first load up sc2sea and then close each thread as you are finished with it while still having sc2sea open in your first tab.
Even the smallest donations help keep sc2sea running! All donations go towards helping our site run including our monthly server hosting fees and sc2sea sponsored community tournaments we host. Find out more here.