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Sync stuck at sign-in screen

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I have the latest version of Firebox on two laptops and activated the new sync on one. Other laptop won't let me sign in - keeps loading. Trying to sync but stuck at sign-in screen.

I have the latest version of Firebox on two laptops and activated the new sync on one. Other laptop won't let me sign in - keeps loading. Trying to sync but stuck at sign-in screen.

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What are your cookie settings?

  • Tools > Options > Privacy > Firefox will: "Use custom settings for history"

Make sure that you allow cookies for the accounts.firefox.com domain if you aren't allowing cookies generally or use the 'Ask me' cookie setting.

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Changed cookie settings still not able to sync.