But it&#x27;s perfectly normal to depend on some OS parts and have minimum version requirements. Happens with everything out there, just that thresholds are different. Any recent Chrome doesn&#x27;t run on Windows XP. IE11 doesn&#x27;t run on Vista. Edge doesn&#x27;t run on 7. Safari 7 doesn&#x27;t run on OS X 10.8.<p>What do you propose to MS - to spend time supporting Windows Vista? Or make a browser that supports it? Bet they just don&#x27;t care about Vista, besides security patches and alike stuff that they have to do under various enterprise contracts. Given that they go lengths to persuade 7 &amp; 8.x users into upgrading to 10, doubt they care much about those versions, too.