We're currently maintaining two base templates because some older pages aren't responsive. base.html = old and fixed, base-resp.html = new and responsive. Any new pages on mozilla.org should be responsive, with the ultimate goal of eliminating base.html entirely. 

But a Facebook tab might *need* to be fixed, I'm not sure. And even in that case it might be better to make a new base template that modifies base-resp.html rather than reference the old base.html that we're trying to kill off.