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Firefox version 115 ESR will be the last supported release for macOS 10.12, 10.13 and 10.14
Mozilla account is a safe and easy way to access Mozilla services on all your devices. Learn how to create an account and access services.
Windows 10 may interrupt your Firefox install with a warning about "Microsoft-verified apps". Firefox is safe to install and use, so choose "install anyway".
How to change your email address for your Mozilla Account.
