@jack, roger, stephen, aaron, tim, james, and any others I may have missed, thanks for all your efforts. @list, sorry for the noise. Once again the problem existed between the chair and the keyboard (pebcak). I moved .mozilla out of the way and restarted firefox which recreated a clean .mozilla directory. iframes worked. So I went file by file, dir by dir looking for a difference that could explain what was happening. Got to /chrome/ and found the file userContent.css where the resident genius had added the line iframe {display: none;}. Sometime ago in the wayback I was experimenting with using iframes as a client/server communication channel and since there was no need to see/style them I hid them from myself (which also let me explore customizing firefox). By the time I had finished with the experiments I had completely forgotten about userContent.css. It's taken months to figure out what I'd done. Sure made online-banking/bill-paying/etc. an endeavor every time I tried. If it weren't for firebug I'd have been back to writing checks. aaaargh! Thankful, sorry, and embarrassed, Mike Wright -- users mailing list users@xxxxxxxxxxxxxxxxxxxxxxx To unsubscribe or change subscription options: https://admin.fedoraproject.org/mailman/listinfo/users Guidelines: http://fedoraproject.org/wiki/Mailing_list_guidelines