Though it’s not mentioned until close to the end of the page, a recent announcement on the Opera blog entitled ‘Opera is Reborn‘ is actually about a specific new version of the browser: 45.

Opera 45 includes numerous changes to the user interface, mostly related to aesthetics: colours, backgrounds, icons, and animation. The integrated ad-blocker now reloads pages automatically when ad blocking is switched on and off. Social messaging software (Facebook Messenger, WhatsApp and Telegram) is now integrated into the sidebar. Video performance is improved slightly on some hardware. And you’ll now see warnings below password and credit card fields on web sites that don’t support encryption.

Many of Opera 45’s changes come from the experimental browser Neon, which Opera released a few months ago to test some ideas and elicit user feedback.

You can peruse the full change log for more information. That log includes changes to development and pre-release versions as well.