fixed firefox app warnings
fixed firefox app warnings

christroutner/xbmc-web-remote,goldenratio/xbmc-web-remote,beermix/xbmc-web-remote,christroutner/xbmc-web-remote,beermix/xbmc-web-remote,beermix/xbmc-web-remote,christroutner/xbmc-web-remote,goldenratio/xbmc-web-remote,goldenratio/xbmc-web-remote