From Opera Press Release
To provide a leading browser on Android and iOS, this year Opera will make a gradual transition to the WebKit engine, as well as Chromium, for most of its upcoming versions of browsers for smartphones and computers.
“The WebKit engine is already very good, and we aim to take part in making it even better. It supports the standards we care about, and it has the performance we need,” says CTO of Opera Software, Håkon Wium Lie. “It makes more sense to have our experts working with the open source communities to further improve WebKit and Chromium, rather than developing our own rendering engine further. Opera will contribute to the WebKit and Chromium projects, and we have already submitted our first set of patches: to improve multi-column layout.”
Not enough resources to develop their Presto rendering engine anymore?