Isn't this just the standard 'Windows is woefully insecure' problem? I would be curious to see how this works in the browsers on OS X.
Personally, I just disable all password storage on all browsers and use 1Password.
This is the airtight hatchway we're talking about. The post's premise, and the solutions for Chrome and IE, imply bad guys are already on the other side. All hope is lost. Best you can do is try and make it so that anyone just stumbling around rather than purposefully looking for the passwords doesn't find them, and the value of that is questionable on false sense of security arguments.
It's non-news to anyone who understands how Windows is built.