Our Favorite Lifehacker Posts of the Week

This week, Lifehacker shows you what Firefox extensions you really should be using, plus what you can do when your internet connection gets severed. I hope it's not going outside.

IE8's InPrivate actually does OK at ad blocking
Backup your Linux machine in one click
What to do when your internet's out

SkiniTunes adds lyrics to iTunes
Get 733 free MP3s from Amazon
10 Must Have Firefox Extensions

Follow Lifehacker Editors on Twitter (Don't forget to follow us too)
Tax day roundup
Improve your outdoor portraits with good lighting