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When attempting to download Firefox, I received message..."Firefox Setup 13.0.l.exe is unsafe to download and was blocked by Smart Screen Filter???????


I'm unsure how to proceed having received this "unsafe" message.

Additional System Details

This happened

Just once or twice

This started when...

This happened when I attempted to download Firefox

Installed Plug-ins



  • User Agent:

More Information

My only troubleshooting was to contact Firefox support.

Michael Verdi
  • Administrator
  • Moderator
107 solutions 739 answers

Where are you downloading Firefox from? Download it from mozilla.org/firefox to be sure you are getting the real thing. If you still get this error when downloading from mozilla.org/firefox let us know because the Microsoft Smart Screen feature in IE 9 should not block this.