The update from Firefox version 27 to 28 has prevented users from logging in with their AUSkey to Australian Government websites such as abr.gov.au, bp.ato.gov.au The AUSkey software required by these sites is unable to load. The software has custom Java plug-ins which were working fine in prior versions. An urgent fix is require as Firefox has been the most stable of all the browsers with these products and will lose much support if the issue persists.