Mozilla is taking steps to lock down mixed content Web sites for Firefox in an update Friday to Firefox 23 Aurora.
In Firefox 23 Aurora, the pre-beta version of the browser for Windows, Mac, and Linux, Mozilla will block by default mixed active content. Mixed content is a term that refers to a Web site secured with HTTPS that loads some of its content, such as images or scripts, from standard HTTP sources, and can lead to eavesdroppers and man-in-the-middle attacks.
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Mixed active content describes things like scripts because they can actively change how you interact with the site. Mixed passive content, such as images, just sits there in most cases.
The mixed content blocker will give people a choice to disable it on a per-site basis, and load the potentially dangerous content.



A resident in Seattle, WA tells CHS: