Firefox throw can't find temp file error

[Francesco Ariis]

On Mon, Aug 13, 2018 at 08:22:59PM +0200, Matthias Apitz wrote:
> Well, verifying the identity of an unknown person with some server over the
> Inrernet is not very reliable, isn't it?

Interesting but I suppose we should keep this OT.

OP, I too have a similar problem: if I try to open a text/html
attachment while firefox is running, I get a "File not found screen";
every works ok (i.e. Fx gets launched and the attached html gets
displayed) if firefox isn't running when I invoke `view-attach`.