New answers tagged explorer-view
No, you can't force browsers to support features that aren't available. Browser compatibility is a lot better than it was, there are still things that are reliant on ActiveX controls. See the Plan browser support in SharePoint 2013 TechNet article. https://technet.microsoft.com/en-us/library/cc263526.aspx
A user needs to have Full Control of the site in which the document library is located before they can access Explorer View. I had previously given the user full control at document library level and they still couldn't access Explorer View. So I granted them full control at site level and they were then able to access Explorer View.
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