Yes, it has options similar to the Web Developer extension for Firefox, such as disabling specific stylesheets, resizing the window or outlining block level elements (which I've always found to be very useful).
It's not as nice/refined as the Web Developer extension of course, for example that 'outline block level elements' readjusts the whole page which it does not do in firefox (which is why I found it useful in firefox, it didn't actually add a 1px border).
It's not as nice/refined as the Web Developer extension of course, for example that 'outline block level elements' readjusts the whole page which it does not do in firefox (which is why I found it useful in firefox, it didn't actually add a 1px border).