This has been released: https://portableapps.com/news/2020-07-17--thunderbird-portable-68.10.0-r...
I've built a test version of the current stable Mozilla Thunderbird build with portablization of newer extensions and dual-mode 32-bit + 64-bit support. It's packaged in release form, so be sure to back up your existing install before testing.
Download REMOVED, this has been released
85MB download / 337MB installed
MD5: bb494dbd7a7ecf768dcbc37623e3c264
SHA256: 59b50a639662ae7115dd929ebb29b9f9f627ae6e790a68df630a4fce97cbaf5e
Please test out portability with extensions and calendars and report back your findings so I can push this out for everyone. Thanks for testing!
Installed add-ons:
Allow HTML Temp
CompactHeader
Enigmail
Lightning
Manually sort folders
MRC Compose
Provider for Google Calendar
Remove Duplicate Messages (Alternate)
ReplyWithHeader
Signature Switch
ThunderHTMLedit
Waiting for the German localization.