

Safari 10 for OS X Yosemite and OS X El Capitan does not include all of the new features available in macOS Sierra, like Apple Pay on the web and picture-in-picture support for videos, but the update includes the following new functions:
[*]Safari Extensions such as 1Password, Save to Pocket, and DuckDuckGo
[*]New Bookmarks sidebar, including double-click to focus in on a folder
[*]Redesigned Bookmarks and History views
[*]Site-specific zoom: Safari remembers and re-applies your zoom level to websites
[*]Improved AutoFill from Contacts card
[*]Reader improvements, including in-line sub-headlines, bylines, and publish dates
[*]Legacy plug-ins are turned off by default in favor of HTML5 versions of websites
[*]Allow reopening of recently closed tabs through the History menu, holding the "+" button in the tab bar, and using Shift-Command-T
[*]When a link opens in a new tab, it is now possible to hit the back button or swipe to close it and go back to the original tab
[*]Improved ranking of Frequently Visited Sites
[*]Web Inspector Timelines Tab
[*]Debugging using Web Inspector
Safari 10 also includes a number of security updates, including fixes for six WebKit vulnerabilities and issues related to Reader and Tabs.
Article Link: Safari 10 Now Available for OS X El Capitan and OS X Yosemite