Undigestify for latest Thunderbird?

[ilario]

I just compiled and tested Undigestify on Thunderbird 78.8.0 (64-bit) and works well (except for the issue described in #1).
Is there anything missing for having an official release supporting Thunderbird 78?

[ilario]

Just tested on Thunderbird 91.3.0 (had to modify the manifest.json for forcing this) and got this error:
JavaScript error: jar:file:///home/[...].default/extensions/undigestify@kamens.us.xpi!/chrome/content/background-implementation.js, line 411: TypeError: copyService.CopyFileMessage is not a function