Measure alternatives

A tool for designers to measure screen dimensions This extension measures the dimensions from your mouse pointer up/down and left/right until it hits a border. So if you want to measure distances between elements on a website this is perfect. It doesn't really work with images because there the colors change a lot pixel to pixel.

The Baseliner extension adds a fully customisable CSS layer on top of any website to help you align your design and ensure the grid is in place.