I think many had a similar experience with Firebug, including me. I remembering coming across it for the first time in an issue of Dr Dobb's. I read the article

I think many had a similar experience with Firebug, including me. I remembering coming across it for the first time in an issue of Dr Dobb's. I read the article wide-eyed. Truly a "game changer" worthy of the term.