When I browse, I often have multiple windows with lots of tabs open at once. Chrome gives me an option to "Continue where I left off" but only does this for a single window at a time.

Create an extension that lets me press a single button to close all of Chrome. It should also automatically restore all these windows when I start Chrome. My current workaround is to kill the Chrome process and it'll attempt to restore when I restart Chrome.

I'm not familiar with Chrome extensions so I'm not sure how hard this would be. But if someone built this, I'd definitely use it!