Ranked in these QuestionsQuestion Ranking
Pro Extremely fast
Pro Works elegantly in OSX
The rendering of the pages and the browser compatibility with OSX works smoothly, when compared to other browsers. Also you get very high battery life with Safari, when compared to Chrome.
Pro iCloud syncing
Tabs, passwords, bookmarks and, history all sync across devices.
Pro Sleek design
– No distraction stuff like favicons in tabs, all that borders, bevels and embosses in panels like in other browsers, no ugly shaped tabs.
– Neat adress bar.
– Good looking start “show all tabs” screen.
Pro Safari uses Webkit, a great open source web engine
Webkit is very light compared to Blink, renders web pages at an incredible speed, great CSS support and is also constantly evolving.
Con OSX only
Apple dropped Windows support after Safari 5.
While Safari er is currently available gratis (without monetary charge) on Mac OS X, it is currently not libre (meaning that it does not allow users to view the source code used to create, to modify that code, or to redistribute modifications) and is therefore neither free nor open-source software.
Con Poor support for new web technologies
Safari usually takes its time when it comes to adopting new and useful web technologies meaning that the user gets an inferior experience compared to other modern browsers.
Con Outdated Rendering engine
All other browsers and toolkits (Qt/GTK) have shifted to Googles Blink-fork of KHTML/Webkit so Apple is currently the only main contributor left.
Con Terrible support for open source formats like .VP9 or .ogg
Apple does not support open source formats. Instead, they use H.264 and H.265.