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However, in 2014 they officially switched to a more traditional cloud-based syncing solution.
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In the past, Firefox Sync used a pretty beefy system to secure your data. Unfortunately, Firefox Sync is another story. Provided you create a complex master password in addition to using the service, Firefox Password Manager should store your data securely using a 256-bit AES cipher. What's more, Firefox can only store web-based passwords, which means you won’t be able to use the password manager with non-web-based programs/information. For example, Firefox can’t generate strong passwords for you.
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In addition, Firefox is also open source and doesn’t pass your personal data to their parent company like other mainstream browsers do. Without this option, other mainstream browser-based password managers are too much of a security risk to use. Currently, Firefox is the only browser that offers you the ability to encrypt all of your passwords with one master password.
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