I misspelled my email address while signing into my existing Firefox account on my new laptop. I didn't realize it until I didn't receive the Verification Code. Then I looked and saw the misspelling. I can't change it; it's greyed out. I tried closing and reopening Firefox so I could start over but the only option is to finish setting up the account. How can I clear it so I can start over or change it to the correct spelling? Thanks.