That scan is not from Mozilla! It's a fake scan done by a nefarious web site.
Don't install the program that you downloaded, it may cause you a lot of grief. Run a deep scan with your anti-virus application to make sure you didn't pick anything else up from that website.

thank you for the response , i hope firefox does something about it

Remember that Mozilla just doesn't have software which does scans like that, so you have to realize that it isn't from Mozilla when something like that appears.

When user's come across a fake we site like that they need to use the Help > Report Web Forgery... menu item to report those forgeries as quick as possible. The problem is that new web sites like that start up to replace those that are shut down, as quick as Google Safe Browsing add's a particular URL to the anti-phishing data base.

thanx again ill remember that for the future

I came across this same problem on Monday, too (stumbled across such a website via Google Images). It was so well done that I almost, for a split second, wanted to click on it - but fortunately I realised on time that it couldn't be from the Mozilla team, and so I refrained from it. :)

However, I wonder whether just being present on that website was already enough for it to install malware and viruses onto my computer? I'm on Linux Mint, so I suppose I technically don't need to worry about malware and viruses - but Firefox itself isn't specifically Linux software and so it still could be vulnerable to e.g. browser hijacking (even on Linux), which is why I'm still a tad worried. I ran a scan of ClamTK, which didn't find anything - so hopefully I'm safe. I would still like to know, though: does anyone know whether these websites *still* install malware onto your computer, even though you never clicked anything?

Either way, I made two screenshots of the nefarious website (I had to make two in order to be able to show all the "scanned" objects) and attached them to this post of mine, so that the Mozilla team can see what these look like and what URL the one I encountered is located at. I hope that helps you guys somewhat. :)