The main guy behind QT, while not the first on the project, he has been the main vision behind all the technical parts for 25 years. He wrote the engine that we now know as webkit and chrome.
Considering what happened to khtml in the last 15 years I'd use firefox myself. Come to think of it I actually did get one patch into khtml back in the day (exactly one, don't read too much into this), and I now use firefox. I keep thinking I should resurrect the khtml project so we get a good open source engine again - (firefox is more than an engine), but realistically it needs more love than once part time person can give it.
