This plugin for firefox is not well known to the public but it can save a hell lot of a time if you are a web developer!!!

visit this link and check out the amazing things it can do:
www.chrispederick.com/work/webdeveloper

Hope this plugin help us all out and save us some worthy time!!!

I dont know if this is the correct forum to post this so the moderators are kindly requested to move it if needed.

Check the pic to see how it looks...