Flash8 - JavaScript security problem

I was shocked this morning by one new Flash8 feature. I was testing my new movie which uses JavaScript for popup some images. First I made test in IE and nothing happened. I have checked JavaScript/AS code and everything was fine. Than I tried with Firefox and got popup window with security worning with 2 options: OK - Settings

I clicked “settings” and was redirected to:

This is one of the most stupid things I’ve ever seen! Why should I allow anyone to manage my local security settings, even Macromedia? Is there any other way to change these settings, because I can’t test each line of code online?