Attachment handling from Previewer

[SiMoz]

Currently the options (in Preferences) are

1) Preview in thunderbird
2) Always ask (which leads to an 'Open in...' or 'Save' submenu
3) Save file

Most of the time option 1 is fine. Occasionally I want to open in an external app, but the only way to do this (if Option 1 is selected) is to save it first - which I rarely want, and which adds unnecessary stuff to my PC.

So how about an option from the Previewer to 'Open in...' <default app> | <list of possible apps>?

[Jon]

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[MattAuSupport]

Are you just talking about PDF files here?  I do not know of any other type of attachment where Thunderbird has a built-in reader, other than plain text files, and they just appear appended at the end of the message.

[SiMoz]

Yes, that was my specific use case.
It would apply more generally if other built-in readers exist.