There’s also a Panic Button extension available for Firefox: With this add-on, you can hide open tabs by clicking the extension button on the toolbar or pressing F8.

If you're reading this, there's a good chance you're doing so on Chrome. It's the browser I've used daily for over a decade and makes up over 60% of overall browser usage. Trailing way behind is ...

With one press of the button, Opera mutes every tab open in your browser and hides all windows ... but if you're using Opera at work, your boss may raise an eyebrow when they see YouTube or ...

It's like a magic undo button for your browser. Every time I hit it, the tab reappears like nothing ever happened. Out of all the shortcuts I use, this one's the real MVP.