They basically started the development of WebKit in secret based on KHTML despite having to release the source when they released Safari. The result was two cod

They basically started the development of WebKit in secret based on KHTML despite having to release the source when they released Safari. The result was two codebases too different to merge, and the improvements couldn't go "back to the community" without discarding many other improvements, not to mention the work needed to integrate it into KDE.