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> This works across OSes and browsers.

It doesn't work for me in Firefox on Linux. I'm very curious to know how it works for you.

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Does their Firefox extension not inject its own WebAuthN implementation into every visited site on Linux? It does for me on macOS (i.e. it overrides the OS/browser-provided one).
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Is this really how password managers extensions work? They inject arbitrary javascript in every page you visit?

I would have naively thought that there'd be a better and safer API for it, considering that all browsers already have the infrastructure in place to handle login autocomplete.

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except... i store my password for work in bitwarden, so I dont want to also keep my work passkeys in the same place. For my personal stuff, that is a risk I can live with so far, but for work it seems dumb.
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Your Bitwarden should enforce the necessary 2-Factor auth for this scenario, but if you’re worried just make sure to be careful when registering that single passkey.
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Yeah, definitely don’t mix work and personal credentials. But many password managers allow using different accounts/vaults on one machine.
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