Safari 5.1.5 is a web browser developed by Apple Inc, available for download in full install version for Windows platforms from legacy sources. This version of Safari was officially released on 2012-03-26 for public access and a brief summary of important updates and change log pertaining to this edition can be read below.

Safari 5.1.5 is built on Webkit 534.55.3 rendering engine and has fixed problem in HTML5 video. Screen turns to automatically dim during media opens HTML5 Video requiring user intervention  has been eliminated in this version fix.

Start-up time with Extensions has been optimized to speed up, also now Safari allows Cookies set during browsing made available in Private mode also.