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