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Apple today released a new update for Safari Technology Preview, the experimental browser Apple first introduced two years ago in March of 2016. Apple designed the Safari Technology Preview to test features that may be introduced into future release versions of Safari.

Safari Technology Preview release 53 includes bug fixes and feature improvements for Service Workers, WebRTC, Loading, Rendering, Media, Accessibility, CSS, Web API, and Web Inspector.

The Safari Technology Preview update is available through the Software Update mechanism in the Mac App Store to anyone who has downloaded the browser. Full release notes for the update are available on the Safari Technology Preview website.

Apple's aim with Safari Technology Preview is to gather feedback from developers and users on its browser development process. Safari Technology Preview can run side-by-side with the existing Safari browser and while designed for developers, it does not require a developer account to download.

Article Link: Apple Releases Safari Technology Preview 53 With Bug Fixes and Feature Improvements
 
Anyone know if this fixes the video issues? I get diagonally sliced video in Youtube and Netflix...¿
 
482 out of 555 (as the last few releases)

Yeah and if you take out the ogg theora and Webm stuff then actually Safari is ahead of Firefox. You really have to look which features Safari isn't supporting and whether they are really crucial. I personally care more about h.265 support that Safari (even production) has, while Firefox doesn’t support h.265, but is all over ogg theora that except for a few Stallman disciples nobody gives a flying toss about.

Also webm vp9 video sucks, even on Chrome it's very CPU heavy, so when I use Chrome I used an add-on that forces it to use h.264 instead which get hardware support and is much more battery and CPU friendly.
 
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