This is also available in Safari (not sure about Chromium) http://developer.apple.com/safari/library/documentation/AppleApplications/Conceptual/Safari_Developer

This is also available in Safari (not sure about Chromium) http://developer.apple.com/safari/library/documentation/AppleApplications/Conceptual/Safari_Developer_Guide/DebuggingYourWebsite/DebuggingYourWebsite.html#//apple_ref/doc/uid/TP40007874-CH8-SW20 http://developer.apple.com/safari/library/documentation/Appl...