If you use Firefox you are not allowed to apply for a position on Securitas's web site. Apparently they believe open source users are not trustworthy or reliable. By trying to start the online application, Firefox users are routed to a page stating that Internet Explorer 6 must be used.
http://www.securitas.com/us/en/Career/Come-Join-Us/Start-On-line-Application/
When you design and build a web app for public consumption you need to develop for ALL major browsers or risk losing business. These guys are nuts!