I asked before and did not get a useful response. I want to define a helper application in firefox that says that let us say: application/pdf with extension .pdf should be handled by program acroread. This is easy to do in mozilla but no amount of documentation reading shows me how to do this in firefox. Can someone help? -- ======================================================================= You may get an opportunity for advancement today. Watch it! ------------------------------------------- Aaron Konstam Computer Science Trinity University One Trinity Place. San Antonio, TX 78212-7200 telephone: (210)-999-7484 email:akonstam@xxxxxxxxxxx