(In reply to comment #6)
> The end-user does not ask anything, they just open the attachment.
No. End user did ask "do it always", in addition to "just open".
Problem is;
User can't know what happens by it, and user surely doesn't know what bad will
happen by it if mime-type or file extension in mail is bad, and user surely
doesn't view message source to know whether mime-type in mail is good or bad.
Even though so, Tb unconditionally creates mimeTypes.rdf entry for bad or
unwanted mime-type if "do it always" is requested by user, and Tb
unconditionally uses it with highest priority once bad entry is created.
And, once created, it's hard to know "what kind of wrongness exists" via
Tools/Option/Attachments UI, and, even if user noticed about bad entry, "how to
delete entry" is not so obvious because it's placed as an action item in action
drop down menu which is for Tb's behaviour when the mime-type is detected in
mail("Choice of an action is similar to "Edit".)
Behaviour on mimeTypes.rdf around the "do it always" was imported from Firefox.
As mime-type is obtained from HTTP(s) server when browser, mime-type is correct
in almost all cases. So, problem due to bad mime-type is very exceptional if
browser(note: never "not occur" even if browser. problems due to bad mime-type
were really reported for browser too, and still exists).
See bug 417590 comment #6, and bug 417590 comment #8 which is answer to it,
please.
Bug 462629 is for concern like bug 417590 comment #6.
Bug 462629 is for "once created" phase.
I think your proposal is a kind of "extension to the dialog" stated in Bug
417590 comment #8, although "dialog" in that context is dialog at
Tools/Options/Attachments if Thunderbird, and "dialog" in your extension is
"open/save dialog".
Your fix seems for improvements in "creation" phase. No improvements in "use of
entry" phase after creation by your patch?
> The proposed fix is very simple, Mozilla guys may use it or not, i
just propose it.
To land your fix on Tb, your extention should be approved as standard/embed
extention, or should be converted to a patch and approved by developers.
I think your extention is better provided as ordinal add-on first, like "Extra
Folder Columns", "FiltaQuilla", at addons.mozilla.org.
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https://bugs.launchpad.net/bugs/500367
Title:
Thunderbird sends .doc attachments with wrong mime-type (text/richtext)
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