Out of curiosity I tried to configure Thunderbird with Split GPG-2 and it works. No need to follow Split GPG-1 docs: any how-to about Thunderbird using an external GnuPG will work. Split GPG-2 doesn’t need any extra step!
Refs:
- Thunderbird:OpenPGP:Smartcards - MozillaWiki
- Encrypt emails with Thunderbird and GPG | Bacardi55's Web Cave
Side note: maybe the whole Thunderbird section could be replaced in the Split GPG-1 page by something like that:
The built-in functionality is more limited currently, including that public keys must live in your
work-emailqube with Thunderbird rather than your offlinework-gpgqube.Follow any tutorial about smartcards or external GnuPG. The only extra step is to make sure to set
mail.openpgp.alternative_gpg_pathvalue to/usr/bin/qubes-gpg-client-wrapper.