you type in your password and 2fa code.

I don't. I prefer writing down my passwords on a little notebook. It's ironic as hell that a "coded" paper note at my own home is more secure than anything on my computer

all your favorite extensions are already inatalled and synced (including custom filters in uBO)

I'm vanilla as hell, I just use default uBO and sometimes NoScript. To me, sync offers nothing of value.