Hey cfb45 and welcome to the firefox community forums! I would first ensure that your browser plugin s and drivers for your Epson XP620 are up to date and running correctly. If not then please uninstall and reinstall. As I belive this is a Epson issue rather than a Firefox issue, I would advise you to check the support page for the XP620. I will place a link here. http://www.epson.com/cgi-bin/Store/support/supDetail.jsp?UseCookie=yes&oid=253770&infoType=Overview All the best Brad