Argh. My Linux box’s HD has somehow gone too corrupt to boot (or reinstall). I guess I need to find data-recovery service.
Meanwhile I’m using my old Mac – too old for MacOS X, and therefore too old for Mozilla. I’m stuck with Netscape 4.5, which cannot digest Unqualified Offerings.
Later: I got a new disk, installed Linux on that, and copied my old stuff over; the rot apparently did not affect the content.