Yesterday i changed my username.my firefox always remember my user name and pass but for some reason i got logged out yesterday on my computer.and now i cant log in again even when i put in my new username and try to get my pass, it said username is invalid.im on my phone now and thankfully my acc is still logged in here and my new username shows up.idk why i cant log in and i mostly use my computer so does anyone know who i should ask or can help me pls?