Cannot use 1Password passkey in Ironfox

Hello. I am using Ironfox browser which is a forked one from Firefox, with privacy and anonymity hardened.

When I try to sign in using passkey to any websites, it says 

"Unable to save passkey. For security reasons, 1Password did not save this passkey. The associated URL for this passkey does not match the selected app." 

I believe this is because 1Password does not trust Ironfox.

Bitwarden does and it has a feature to add a custom trusted browsers or apps.

I wonder 1Password will stay with the current policies. Either allow user to add their apps at their own risks, or add Ironfox to the list this time. 

1Password for Android 8.12.30 (81230021)

Thank you.