Links to file UNC paths are disabled by default in just about every browser except Internet Explorer because it is an easily exploitable security vulnerability. Malicious sites could detect your operating system or installed applications by checking default installation paths, or worse, browse your cookies, sifting for sensitive data. As system vulnerabilities are discovered, files related to exploits could also be detected.

I saw this in pdf version on antitrust.slated.org, and I felt compelled to share. Microsoft sees the growing possibilities for open web standards and interoperability, but they don’t agree with the need for change. Yet they push Silverlight? None of us should ever forget: No matter what their marketing arm spins for us, their main agenda will always be sabotage.