Login with device missing for all browser extension

[thetechjester]

I sincerely hope I am posting this in the correct place. If not, please help guide me to the correct place to post this as I want to submit this issue correctly and abide by all forum guidelines.
I did see a similar post but it specifically stated Desktop version. I don't use the Desktop app. Unless the browser add-ons could be considered the Desktop version. If that is the case please let me know and I will repost there.

That said....
I noticed a few weeks ago that the "Login with Device (MFA)" option for the Edge extension was missing. Wasn't a show stopper for me because I typically Chrome and Firefox. I use Edge mostly at work. Last week I noticed it was missing from Chrome. Again not a big deal because Firefox is my daily driver for browsers. Unfortunately today it seems to have disappeared from Firefox. Now I am heartbroken and really freaking out.
Apparently the extension for Firefox was updated today:

My self hosted Vaultwarden docker version (according to logs) is Version 1.35.4 .
My Android Bitwarden version is 2026.2.1 (21297).

Is there something I need to update/change on my end to get this awesome feature back?
Please advise.

[stefan0xC]

This is probably caused by #6960 (which should be fixed in testing). Can you check your Vaultwarden logs?

[thetechjester]

I see this when I interact with the extension add-on:

[2026-03-24 23:22:32.812][request][INFO] GET /api/devices/knowndevice

[2026-03-24 23:22:32.812][vaultwarden::api::core::accounts::_][WARN] Request guard KnownDevice failed: "X-Request-Email value failed to decode as base64url".

[2026-03-24 23:22:32.812][response][INFO] (get_known_device) GET /api/devices/knowndevice => 400 Bad Request

[stefan0xC]

Thanks for the confirmation. The login with device feature requires a known device so if you don't want to wait for the next release you can either switch to the latest testing version or downgrade the extensions.

[thetechjester]

Thank you @stefan0xC !

You guys are awesome!

I am going to mark this as a definite answer to what I am experiencing and pull from testing for now.

Thanks again!