In Firefox 84.0.2 I tried to access an old YouTube account from a gmail email. it signed me out and I have to change the password to get back in to gmail. It gave me message about "a suspicious app, etc." but I KNOW I don't have any suspicious anything on my new Macbook Pro. I finally realized that on Chrome I can stay signed in, but in Firefox, every time I try to sign in with the changed password, it goes through the whole thing again. I want to use Firefox, but right now I want to be able to access my email! I also don't want to have to stay signed in. Also, I was on a new device, AND in another country -- Apple could not help me (just said to change password), and I didn't have Chrome on my new Mac at that point, though probably should have tried it before all the changing....

Anyway, I looked up everything I could. The checkbox that the directions at one point said to uncheck isn't in my screen in Firefox 84.0.2. Thanks.