I’m trying to login to Facebook on a laptop but received a msg I need to use containers and that requires me logging into my Firefox account but it isn’t letting me on

I was trying to login to Facebook on a windows 10 laptop using Firefox. After repeated attempts I received the message that Firefox/Facebook uses containers and to enable containers I needed to login to my Firefox account but even tho I pasted the code sent to my email it won’t let me login. How can I login? I have my recovery key if I need to input that. ThY!!