I am considering switching from IE9/F12 Developer Tools to Firefox/Firebug Looks like firebug is more intuitive than Microsoft's F12 Developer Tools... but not always: Just noticed that Firebug's "Computed" tab does not allow me to drill down/expand on each property (e.g. Box Model: width) to see a list of style rules that have this property defined (something I find very useful on Microsoft's "Trace Styles" tab); so instead, I am scanning through the Firebug "Style" tab to try to find all style rules that have this property defined. Being a newbie with firebug, I am wondering if there is a way to do what I want or maybe an add-in?