Passkeys not offered by 1Password in Firefox 158.0.1

While I have followed the recent change logs regarding passkey fixes, they only temporarily worked on my side. Currently, 1Password in Firefox fails to offer passkeys on all websites, that request WebAuthn.

Environments tested:

• Windows 11 Home 26H2 26300.9711
• Firefox 158.0.1 in incognito mode, with only 1Password enabled
• 1Password browser extension version 8.12.41.1, 81241001, on STABLE channel

• 1Password browser extension version 8.12.42.34, 81242034, on BETA channel

Reproductions:

For example, x.com throws the following error to the console, when trying to log in:

[jf:Input2.Passkey] Browser does not support passkey operation for mode=1

A self-hosted authentik instance also reports an error, when trying to log in with a passkey:

[WARN] (flow:ak-stage-authenticator-validate-webauthn): Failed to authenticate Error: WebAuthn not supported by browser.
    yt webauthn.ts:28
    authenticate AuthenticatorValidateStageWebAuthn.ts:45
    tryAuthenticating AuthenticatorValidateStageWebAuthn.ts:111
    updated AuthenticatorValidateStageWebAuthn.ts:100
    _$AE reactive-element.ts:1563
    performUpdate reactive-element.ts:1528
    scheduleUpdate reactive-element.ts:1410
    _$EP reactive-element.ts:1382
    requestUpdate reactive-element.ts:1321
    _$Ev reactive-element.ts:1055
    $ reactive-element.ts:1038
    b lit-element.ts:130
    G Base.ts:111
    t locale.ts:63
    u base.ts:38
    u base.ts:17
    m AuthenticatorValidateStageWebAuthn.ts:26
    u lit-html.ts:1223
    $ lit-html.ts:1644
    _$AI lit-html.ts:1480
    p lit-html.ts:1287
    $ lit-html.ts:1641
    _$AI lit-html.ts:1480
    $t lit-html.ts:2283
    update lit-element.ts:171
    performUpdate reactive-element.ts:1514
    scheduleUpdate reactive-element.ts:1410
    _$EP reactive-element.ts:1382
    requestUpdate reactive-element.ts:1321
    set reactive-element.ts:789
    a AuthenticatorValidateStage.ts:257
    handleEvent lit-html.ts:2114
    _$AI lit-html.ts:2103
    p lit-html.ts:1287
    $ lit-html.ts:1655
    _$AI lit-html.ts:1480
    k lit-html.ts:1721
    _$AI lit-html.ts:1499
    p lit-html.ts:1287
    $ lit-html.ts:1655
    _$AI lit-html.ts:1480
    p lit-html.ts:1287
    $ lit-html.ts:1655
    _$AI lit-html.ts:1480
    p lit-html.ts:1287
    $ lit-html.ts:1641
    _$AI lit-html.ts:1480
    $t lit-html.ts:2283
    update lit-element.ts:171
    performUpdate reactive-element.ts:1514
    scheduleUpdate reactive-element.ts:1410
    _$EP reactive-element.ts:1382
    requestUpdate reactive-element.ts:1321
    set reactive-element.ts:789
    reset AuthenticatorValidateStage.ts:181
    reset base.ts:31
    handleEvent lit-html.ts:2114
AuthenticatorValidateStageWebAuthn.ts:114:29

Other websites, that I have tested, but that do not offer any valuable browser console output:

• reddit.com
• youtube.com