Le site s-microsoft.com est-il sûr ?

That domain name is owned by Microsoft Corporation. Source at https://gwhois.org/s-microsoft.com+dns That domain name s-microsoft.com is empty. So no information about what Microsoft use that website for. It might be for serving assets. Such as images. Related to that domain name, the “HTTPS Everywhere“ add-on/extension has a rule for both ***** and s-microsoft.com domain names. This rule "currently rewrites requests to s-microsoft.com (or its subdomains)". That rule is for security prevention. What the rule does is force secure connections via “httpS” instead of insecure “http”. That rule is not a security concern. Read more at https://www.eff.org/https-everywhere/atlas/domains/s-microsoft.com.html Related code at *****