Issues:
You just accidentally closed your Google Chrome browser, and oh boy, you lost all your open tabs and windows. Google Chrome has a really helpful short-cut to get them all back. You also have similar options in Firefox and other browsers but have to use their menu system to “Reopen closed tabs”.
The Solution:
In Google Chrome simply use this sort-cut keyboard hotkey:
Ctrl+Shift+T
If you’re not using Google Chrome, my question is: “Why not?” 