diff --git a/website/docs/flow/stages/authenticator_validate/index.md b/website/docs/flow/stages/authenticator_validate/index.md
index 9fa3a45c8..b72afa47a 100644
--- a/website/docs/flow/stages/authenticator_validate/index.md
+++ b/website/docs/flow/stages/authenticator_validate/index.md
@@ -34,6 +34,9 @@ You can configure this stage to only ask for MFA validation if the user hasn't a
 :::info
 Requires authentik 2021.12.4
 :::
+:::danger
+Firefox has some known issues regarding FIDO (see https://bugzilla.mozilla.org/show_bug.cgi?id=1530370) and TouchID (see https://bugzilla.mozilla.org/show_bug.cgi?id=1536482)
+:::
 
 Passwordless authentication currently only supports WebAuthn devices, like security keys and biometrics. For an alternate passwordless setup, see [Password stage](../password/index.md#passwordless-login), which supports other types.