checked on github

TotP worked great. good thing, cuz Firefox forced me to use it to write this review :)
It supports multiple keys... just add another and it adds an option. I REALLY like the privacy consciousness of the add-on.

simplest TOTP addon ever. Really great.

So useful! Thanks!

Simple, lightweight, works with github new 2FA requirement, and much safer/private than using an app or online TOTP service