>Firefox with Firebug is good.

Must confess I haven't looked at Firebug - only the built-in Firefox Web Developer stuff. I guess there are good and bad bits to IE, Chrome and Firefox but I can't keep enough in my head to be proficient in all three IDEs :-{

>FYI, the developer tools in IE 11 have been completely rewritten and are very, very good

Haven't tried that yet either.....


>>In IE10 (not sure whether IE9 is the same) there's a 'Trace Styles' tab which shows the HTML hierarchy for the element which makes it easier to determine what is inherited and from where (strike thru indicates a css setting that has been overridden). You can also uncheck the attribute at any level to see how that affects the layout.
>>
>>But in many ways I prefer the Chrome Developer tools for this sort of thing