This morning, upon upgrading my Firefox browser to the latest version (from 22 to 23), some of the key aspects of my back office (website) stopped working.
Looking a
In the relevant page which makes a mixed content https to http call which is not accessible we can add the following entry in the relevant and get rid of the mixed content error.
<meta http-equiv="Content-Security-Policy" content="upgrade-insecure-requests">
Put the below <meta>
tag into the <head>
section of your document to force the browser to replace unsecure connections (http) to secured connections (https). This can solve the mixed content problem if the connection is able to use https.
<meta http-equiv="Content-Security-Policy" content="upgrade-insecure-requests">
If you want to block then add the below tag into the <head>
tag:
<meta http-equiv="Content-Security-Policy" content="block-all-mixed-content">