How do I change the "helper" app associated with .jpg files that come to me as attachments to emails, since your list of alternate apps does not include the one I want (Windows Picture and Fax Viewer)?
I'm using Windows XP home and already have made Windows' association of .jpg files with Picture and Fax Viewer, but Firefox ignores it, and doesn't seem to even recognize that Picture and Fax Viewer is available.
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Windows Picture and Fax Viewer is a DLL and is started via a rundll32.exe call and can't be set as an application to handle images in Firefox 3 and later versions.
Try to set Windows Picture and Fax Viewer as the default viewer in Windows, then it should be listed automatically in the Mozilla Firefox Browse dialog.
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