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Thunderbird has a problem with U2F
I tried to configure Thunderbird with OAuth2. After setting "Authentication method" to OAuth, and while fetching the emails, additional authentication window (think it's a browser window) poped up where I can put my credentials. I initialy used the SMS as 2-nd factor and this works well.
Than I tried to set up my second acount where I use Yubikey4 for 2nd factor amd seems that browser window does not support U2F. Therefore I cannot use my Yubikey with OAuth2 :( Normaly the diode on Yubikey starts to blink when some aps ask for verification. In this case there is no reaction (no interaction with libusb).
I changed the security.webauth.u2f to true and security.webauth.u2f_enable_usbtoken in hope that this will enable the support. Nope. I done similar thing in Firefox in hope that Thunderbird opens Firefox window for 2 factor. Still no success.
Using Google account and yubikey4. Yes I know about "insecure app's password in google" but the point is to use OAuth2 method since Thunderbird seems to support it. It works with SMS at least. The problems seems to be a missing support for U2F in browser window.
To be clear U2F works in my Firefox setup on the same machine. What is the missing piece that Thunderbird has this problem?
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Got it. Thanks!