Act like this has never happened to you. You’re browsing along, minding your business, when all the sudden you want to hide all your open tabs. Like, right NOW. PanicButton does that, and it stores those hidden tabs for later reuse. I’ve found one other great use: if I’m dashing out of my seat to, oh, go rescue a wailing baby or discipline a wayward cat (home offices, eh?), I click the PanicButton real quick before leaping. That way, it doesn’t matter what happens -- the electricity can go out, the cat can bite my mouse, the baby can relieve himself on my keyboard -- and I know that all of my tabs are safe. They even sync across Chrome sessions.