It seems your bowser does NOT support Upgrade Insecure Requests
The Upgrade Insecure Requests functionality allows the web to be made secure without breaking all the links. It allows the traffic on the internet to be encrypted, and the web site securely authenticated, even when the URI starts with 'http:' rather than 'https'.
It turns out that this is really important to allow the web to be encrypted without having to make huge and complex changes to existing web sites and existing web provider software.