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I entered the wrong age when setting up Sync and now it won't allow me to create an account.

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Setting up a Sync account I entered my age as 1 instead of 41. I now cannot create an account because Firefox is remembering my age as 1 and I get an error message saying I am not old enough to create a Sync account,

Setting up a Sync account I entered my age as 1 instead of 41. I now cannot create an account because Firefox is remembering my age as 1 and I get an error message saying I am not old enough to create a Sync account,

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Hi

If you type about:preferences#sync into the address bar and select "Manage Account", you will have the option to delete your account.

You can then set up a new account and apply those details to your second device so that Firefox Sync will be able to connect to it.

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Try clearing your cookies and then try to set up a new account again.