[Feature] In case of missing plain-text part automatically create a plain-text version (ideally markdown formatted)

Hi,

not sure if this is the best forum/plugin but as a long time ATH user I ran into issues where plain-text version is missing and it struck me that it would be awesome if there was a plugin/feature that would automatically create plain-text version, ideally markdown-formatted) so it would be displayed just fine without need to switch to basic-html.

IMHO it could also be used as another mode and virtually convert all html mails to markdown (i.e. display plain-text by default if present and if not render html->markdown version). There is even a library that does just that: https://github.com/mixmark-io/turndown

Suggested here https://connect.mozilla.org/t5/ideas/autom…-p/66141#M37802

Hmm... weird. Another link: `https://connect.mozilla.org/t5/ideas/autom…own/idi-p/66141`

But I just checked in private mode and indeed it says "not found". Maybe it is moderated and has to be approved?

Quote from jobisoft

Isn't that already part of Thunderbird? You can force any message to be displayed as plain text, even if it does not have a plain text part. What am I missing?

If it doesn't have plain-text part then it will display nothing or even "there is nothing here, switch to HTML" text (sic!) hence me using AllowTempHtml....

What's more, quite often plain-text part is just the most rudimentary notification and misses a lot from the HTML variant thus having to switch to HTML version either way. Having automatic display of HTML part converted down to markdown would be awesome (and maybe with tracking rubbish stripped from the links as well while at it)

Hmm... I don't remember what but SimplifiedHTML had some weird issue (I think it was multi-level quoting and some formatting still spilling out instead of just sticking to monospaced font

Hmm... I've been playing a bit more with it and noticed, that ATH now again has "Show HTML" (which is not permanent) so I won't have to use the main toolbar toggle over all modes (plain -> original HTML -> all body parts -> simple HTML).

I tried to tweak ATH options so that "Show HTML" would switch to "simple HTML" view only but I only see "Original HTML", "Sanitized HTML" and "PlainText".

Is it possible to have "Show HTML" switched to "Simple HTML" view only?

Quote from Thunder

Sometimes I wonder if we're really talking about my add-on

You know what? You hit the nail on the head!

I had two addons - ToggleHTML and yours (I think ATH was not working for a while so I got ToggleHTML temporarrily?). Indeed ShowHTML from ATH works perfectly!