Safari for Windows is abandonware.
I recommend you to try Pale Moon.

http://www.palemoon.org/download-ng.shtml

Differences between Firefox and Pale Moon :

https://docs.google.com/spreadsheets/d/1CT9YLUjMyb5Xf8HHcQ66lVh-SALb7cWTmUKgeJOvk00/pubhtml