Hi, Up to the most recent update of Firefox I could preview PDFs within a cloud based software, but when I downloaded them they opened up in my default PDF Viewer. Since the update the preview PDFs in the software just spin and never show, unless I have the setting in Firefox set to "open in Firefox" then I can see them. But if I have that set, then any PDF I try to open or download will open in a new Tab in Firefox, rather than the PDF viewer, and then I have to save it to be able to open it in the PDF viewer. However, if I change the setting to be "Use Windows Default Application" they open up just fine in the PDF viewer, but the previews in the cloud based software go back to spinning and not opening. How do I get back to having both things happen, rather than either / or please? Many thanks for any help offered Best regards Jen