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You can take a look into Qualys SSL labs. Another good Certificate Authority or reseller can provide you with browser compatibility information. An example of this is https://www.positivessl.com/browser_compatibility.php Know that the configuration of your SSL settings also can affect the browser or device compatibility. Other things to consider are: ...


I would guess you purchase a static single domain certificate which only covers the domain name and not subdomain. Sadly, www. is a sub by certificate standards. If that is the case I see 3 moves you could make. 1. Purchase another certificate for the www. that you never plan on using and make a redirect. (Waste of cash, forget I even mentioned it. ...

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