Yes, I know about the procedure which works with downloaded PDF files. However, within Firefox, when I download a PDF file, I am presented with ePDFViewer as the default reader. It is a reader which does not have as many features as does Adobe Acrobat 9.0 So what I end up doing is saving the PDF file and then activating Adobe Reader9 from my program menu. The ePDFViewer default option permits me to select 'Other' but there is no 'Other' and searching for the necessary Adobe file is uncertain to say the least. I have searched Firefox for the Adobe Reader 9 plugin without success.