I was surprised to discover that when I switch from a tab to another tab, the first tab is no longer active. That means that if I'm listening to a sound clip (web radio, youtube etc.) I'm not allowed to be surfing at the same time, or else the clip will stop playing and will resume only when I switch back to the original tab. This is very frustrating, and somewhat strange, too. Opera is the only browser that seems to offer this possibility. Is there a way to do that in the current Firefox version, and if not, could you see to it in the next ones?