There was a web dev addon that would take your comp images and overlay them while you were firebugging a pixel-perfect layout. I found it highly useful early in

There was a web dev addon that would take your comp images and overlay them while you were firebugging a pixel-perfect layout. I found it highly useful early in my career. Edit: found it https://addons.mozilla.org/en-US/firefox/addon/pixel-perfect/ https://addons.mozilla.org/en-US/firefox/addon/pixel-perfect...