Forum communautaire Firefox

I tried to login to Autodesk for some discussion about file retention, etc. I logged in using my user id and password and then Autodesk sent me a code as a two factor identification function. When the page opened the place to enter the code it looked like the image that I have attached. I could not enter the code supplied by Autodesk as FireFox kept trying to get me to do something with email masks. Is there anything I can do to fix it?

I want to change the security rule. I have to get a code from my email in order to login to paypal. I wouldnt have any problem doing a text. Is there anything I can do?

I have lost access to the primary email on the account. I have 2fa setup on the account and I have backup recovery codes. When I go to add another email it sends a code to the primary email, which has no access. Is there a way to use either 2fa or backup codes instead of the code sent to primary email?

Trying to sync Firefox to my mobile device. I get to this point where Firefox on my computer says:

Enter authentication code to continue to account settings Open your authentication app and enter the authentication code it provides.

It wants a 6 digit code. But I don't have an authentication app. How can I set one up for Firefox to sync to my mobile device?