Opera Software announced their intention to transition from their Presto layout engine to WebKit,
building upon the base of the Chromium project, & thus Opera will become a contributor to the Chromium project
Opera software left it's support for the Linux O/S with version 12,
although most Linux O/Ss will only offer up to version 11.
From version 15 onwards, Opera software is aimed mainly at the Windows operating enviroment,
although versions are available for the Mac enviroment, as well.