Mozilla has recently announced that Firefox will block mixed "active" content by default in Firefox 23, after Chromium and even Internet Explorer implemented similar measures. "Mixed content" refers to content being served over HTTP (i.e. plaintext) from within an HTTPS (i.e. HTTP-over-TLS) webpage. "Active" content refers to content which can modify the DOM of a webpage, i.e. any resource which, once loaded, modifies the way the page it is included in is rendered. Blocking mixed content is a...
