Don Report abuse Due to security risks the JavaScript client library is only supported on the latest two versions of each browser. Find Ethereum in the app catalog. As of January 24, 2022, WebAuthn is the only supported standard for security keys in Duo's browser-based prompt. Chrome, Firefox, and Opera were, as of 2015[update], the only browsers supporting U2F natively. In the Search bar of the screen that opens, type u2f. Login with username and password On the "Authenticator App" screen select "Use another two-step login method" Expected Result Security key should be default like on other platforms and should be present in the two step login method list Actual Result web applications - FIDO U2F tokens Web Browsers compatibilty - Stack ... U2F standard to Firefox? - Mozilla Discourse U2F - FIDO Universal Authentication. An MITM case which the U2F device does NOT protect against is as follows: Consider an online service or website which accepts plain password but allows users to self-register and step up to U2F 2nd factor. Click the Install button of the app. For U2F_REGISTER, the P1 and P2 fields are not used. FIDO2/U2F Just Works in: Chrome on Windows Firefox on Windows Chrome on Mac Firefox on Mac Chrome in Ubuntu 20 Firefox in Ubuntu 20 Wall of shame (FIDO2/U2F does not Just Work in): Safari EDIT: it does work out-of-the-box in Ubuntu 20, my bad. Apple doesn't allow apps access to the NFC hardware, so this won't work on iPhones. Users must make sure that browser pop-ups are enabled in order to authenticate with a U2F token. Today I just read about FIDO U2f security keys, a USB dongle that supports 2-factor authentication. FIDO2 is backwards compatible with FIDO U2F but YubiKey + PIN scenarios are not supported on U2F only devices. If you didn't find your browser in the list, this is not a confirmation that 2FA for Jira: U2F & TOTP does not support it. Finally, U2F requires HTTPS with no exceptions. Microsoft reportedly will include FIDO support in Windows 10. Connect and unlock your Ledger device. Open Run from [Windows logo key + r] Type in iexplore.exe -extoff (iexplore.exe<space>-extoff) then hit Enter.