Mozilla Firefox 23 is taking a stance against a common bad practice of websites providing mixed secure SSL and non-
The practice nullifies the benefit of employing SSL for users. For example, what if a session cookie containing login info is part of the non-SSL content delivered to a user.
The new Firefox browser version will make this security preference default.
security.mixed_content.block_active_content
Web elements that will be affected by the new Firefox security blocker will include insecure scripts, stylesheets, plug-in contents, inline frames, Web fonts and WebSockets.