MIME type handling in firefox/thunderbird

[Klaus-Peter Schrage]

Lonni J Friedman wrote:
> I've been googling for almost a week, and have come up dry.  Does anyone
> know how to control the applications that firefox & thunderbird associate
> with different MIME types?
> 
> For example, I get a ton of files in email with a .log suffic which are
> plain text.  Somewhere, somehow, thunderbird is deciding that it should
> use gedit to open/view them, and I hate gedit.  Yet I can't figure out
> where to change/override this behavior.  Anyone know?

Sorry for jumping in so late ...
Now what I've done: I clicked on a sample log file attached to a message 
in thunderbird. A dialog popped up asking whether I wanted to open it 
with the default application (Nedit), from where I could change this to 
my preferred one (kate). After making this permanent, I had a new entry 
in Edit|Preferences|Attachments:
"Anwendungsprotokoll	Open with kate"
and with the "Change Action" button I was able to change this to any 
other editor, e. g. kwrite.

Now do you have anything similar in Edit|Preferences|Attachments?

Accordingly, in thunderbird's mimeTypes.rdf, there was a new entry

<RDF:Description RDF:about="urn:mimetype:externalApplication:text/x-log"
                    NC:path="/usr/bin/kwrite"
                    NC:prettyName="kwrite" />

BTW, I have found lots of useful information about this topic by 
googling on "thunderbird (firefox) helper applications", esp. in Groups. 
  It seems (I faintly remember) that Mozilla had a GUI for changing MIME 
types, but they abondened it in TB/FF for making things easier for the 
masses ...
Klaus
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