First of all, I want to thanks to all of developers who spend their time to create great bsd-licensed qt-based web browser. I tried it and very satisfy with Dooble performance.
Second, I want to suggest developers to use Chromium Embedded Framework (CEF) rather than WebKit. My reason is with the absence of Google as WebKit maintainer it seems that WebKit face some serious problem for future usage. Google is the main developer of WebKit and now he create Blink as alternative. There is no warranty that Google will also maintain Blink in the future. I choose CEF, because it is Google own project which likely he will not abandon it. CEF also already used by many commercial applications which mean it will stay for long time in the future. The migration may resulting more hard work, but it may very worth for long term usage.