Opera users will also notice some things missing in Opera Next 15. The M2 email client is not included in the browser anymore. This is to reduce the footprint and memory usage, Opera said, so it has now moved the app in a standalone client called Opera Mail. The new app adds labeling, filtering, threads and multiple tabs.
Opera Next 15 leaves behind its extensions architecture, so Opera 11 and 12's extension format is no longer supported. Instead, the Chromium extension model is used, and there are tools to convert old extensions. Mouse gestures and keyboard shortcuts are still there, but they are off by default and need enabling from the settings panels if you want to use them.
Opera Next 15 is still in development. However, the company said it would have a fast release cycle, with feature additions and bug fixes based on user feedback.
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