Welcome to Apple software release day, folks. This morning we saw iOS 9.0.2 pushed for iPhone, iPad and iPod touch, along with iOS 9.1 beta 3 for developers.
Now, ahead of OS X El Capitan’s public release, Apple has made Safari 9.0 available for download:
This update adds controls to mute audio in Safari tabs, more viewing options for Safari Readers and has better AutoFill.
You can download this update by launching the Mac App Store and going to the Updates tab.