

You can download the tweaked version HERE. I am going to test it for a few days and then submit a pull request here, if everything works out fine. Rezpping and installing in Thunderbird 78.4.1 seems to lead to a working calendar with associated mail address: There, and at another occurrence seemed like a good idea, so I did it, not knowing what would happen. I unzipped the XPI and looked for the code lines mentioned.

I tried using CalDav instead, but could not get it to work consistently. Messages that contained an anchor tag with an invalid data URI failed automatically when the send button was activated.So I ran afoul of this bug, too.

The issue is fixed, but existing messages may display some words that are not separated by a space as a consequence. The new update addresses an encoding issue for messages with quoted-printable and format=flowed.
