Firefox has nothing to do with Email. It is an internet browser which merely allows you to display and use pages on web sites - like Yahoo or Gmail email. Your problem is, no doubt, with the email site you are using or the email client you have installed on your computer (though I'm guessing you are using yahoo or gmail or another online email service) Check the email options for whatever email you are using. If you can't find anything, go to the support page for the email service and search there or ask a question. If I were you, I'd check all the email options to see is if there is an option to include or not include attachments on forwarded messages. Perhaps the default setting is to NOT forward attachments. But, as I said, Firefox has nothing to do with email. Stan