Firebug
Used by 13 peoplegetfirebug.com ↗



“For debugging web sites, I love firebug.”
Matt Might Interview, CS Professor (University of Utah) · via Uses This 
“Before Facebook I had a web startup which was acquired before we launched our product, but I did launch a popular web debugging tool during that time called Firebug.”
Joe Hewitt Interview, Creator of Firebug, iPhone developer (Facebook) · via Uses This