

Notably, in Safari 11, the web browser blocks videos with audio from automatically playing on most websites. Other new features are outlined in our macOS High Sierra roundup.
Stops media with audio from automatically playing on most websites
Adds the ability to configure Reader, content blockers, page zoom, and auto-play settings on a per-website basis, or for all websites
Improves AutoFill accuracy from Contacts cards
Includes updated media controls for HTML video and audio
Enhances performance and efficiency
Safari 11 was first introduced in macOS High Sierra, which will be publicly released on September 25.
Safari 11 is available as a free update within the Mac App Store.
Article Link: Safari 11 Released for macOS Sierra and OS X El Capitan
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