The reboot was prompted by Opera’s decision to abandon its own proprietary web rendering engine (Presto) in favour of Google’s open-source Chromium engine. Even now, some aren’t coming back – specifically Opera’s old built-in mail client, which is available on its own as Opera Mail.
Rebooted in June 2013 as a Chromium-based variant, the new Opera’s early history was a troubled one, with many long-established features absent. It may not enjoy the same level of attention as other heavyweight web browsers, but there’s still a lot to like about Opera.