When will the FireFox extension get biometric support now that I think it supports nativeMessaging

You are right. The bug in BW Firefox add-on (at least for macOS) is that it assumes that this folder exist - which often is the case as it could be created by other add-ons. It attempts to write there some json config file when browser integration is enabled - hence after creating the folder it is needed to re-enable this setting.

So for unlucky ones full workaround at the moment is:

  1. Create missing folder ~/Library/Application Support/Mozilla/NativeMessagingHosts
  2. In desktop app disable & re-enable the browser integration setting
  3. for macOS Mojave and Catalina create also ~/Library/Containers/com.bitwarden.desktop/Data/tmp if does not exist
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