Opera has said they will leave all the core stuff to Google and just modify UI and other stuff on top. That means almost all development is done by Google.
This isn't the case when you use a small open source codebase. But it is the case here when Opera is using an enormous codebase by a huge corporation, and just innovating in the UI and other modular features on top of the huge core.
This isn't the case when you use a small open source codebase. But it is the case here when Opera is using an enormous codebase by a huge corporation, and just innovating in the UI and other modular features on top of the huge core.