Mozilla, Firefox, etc are just part of the user agent string that can be passed to a website when you browse so you can be served customised content to suit your browser and OS.
In this case the URL scanning site is masquerading as a browser so passes the relevant parameters to elicit whatever response the target web site will give.
The results show the final destination (a page on wonderlandads.com) is listed on a blacklist site as containing malware and if you click on the image the report provides you'll see it purports to be an update to Flash Player. Shall we say it absolutely reeks.
For those interested the report is here:
urlquery.net - Free url scanner