I know you've all been there at one point or another. You have a 'million' internet browsers open as you are dilligently trying to work on a project or looking up something of interest, then, you close a browser (or two) by accident and now you don't remember how to find them back!
I know, you can look through your history! But who really has time for that?
Well, here's a great trick to help you the next time this problem arises, (and I know it will) -
Press CTRL + Shift + T to undo a close tab. Also, pressing this more than once will undo multiple closed tabs.
A great thing about this little trick is that it works in all major browsers including Mozilla Firefox, Microsoft Internet Explorer, and Opera!