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Well Google Chrome as of last year was based on Apple's open source Webkit so that's not quite true.

Webkit isn't Apple's open source. It was already open source when KDE started it.

KDE didn't start "WebKit" per se. Apple definitely deserves some credit for what they did, but you're right: Konqueror originated it all.

Webkit comes from KDE's KHTML project which was GPL'ed. Apple was required to open-source it.

WebKit is not GPL. Its admixture of BSD and LGPL.