diff --git a/user/security-in-qubes/split-gpg.md b/user/security-in-qubes/split-gpg.md
index 252e5520..2dff3068 100644
--- a/user/security-in-qubes/split-gpg.md
+++ b/user/security-in-qubes/split-gpg.md
@@ -135,7 +135,8 @@ Note that, because this makes it easier to accept Split GPG's qrexec authorizati
 
 ### Thunderbird 78 and higher
 
-Starting with version 78, Thunderbird has a built-in PGP feature.
+Starting with version 78, Thunderbird has a built-in PGP feature and no longer requires the Enigmail extension. For users coming from the Enigmail extension, the built-in functionality is more limited currently, including that **public keys must live in your `work-email` qube with Thunderbird rather than your offline `work-gpg` qube**.
+
 In `work-email`, use the Thunderbird config editor (found at the bottom of preferences/options), and search for `mail.openpgp.allow_external_gnupg`. Switch the value to true. Still in config editor, search for `mail.openpgp.alternative_gpg_path`. Set its value to `/usr/bin/qubes-gpg-client-wrapper`. Restart Thunderbird after this change.
 
 [![tb78-1.png](/attachment/wiki/SplitGpg/tb78-1.png)](/attachment/wiki/SplitGpg/tb78-1.png)