I remember the diagram tool draw.io, now diagrams.net mentioning this a few years ago, justifying their domain name change: https://www.drawio.com/blog/move-diagrams-net

The privacy policy mentions a different content delivery network so it has to be updated. I also found “Mastodon” and “kbin” in it.

I think the newest features available in Kbin are not available on Mbin.

What about F-Droid?

Passkeys support is now planned for Firefox 122.
https://connect.mozilla.org/t5/ideas/support-webauthn-passkeys/idc-p/45437/highlight/true#M26276

This version was supposed to bring WebAuthn passkeys support as this source mentioned: https://connect.mozilla.org/t5/ideas/support-webauthn-passkeys/idc-p/39321/highlight/true#M22887
Sadly this is not part of the release notes. I’m disappointed but I hope this will be implemented soon in Firefox.

Regarding replies appearing twice, there is/was this problem on Lemmy. So is it a Kbin problem, or just a problem from Lemmy or from a specific client?
It could be interesting to check for duplicates created from Kbin accounts.