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To avoid these risks, it is best to upgrade your Windows operating system before installing Firefox. Moreover, unsupported versions of the browser do not receive security updates, and they are known to contain exploits. The extended support for Firefox version 52 is over. However, keep in mind that Firefox for XP isn’t supported by the latest versions of Windows.
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You can also get GNU/Linux distribution packages. You can download Firefox 43.0.1 from here, and then install it on Windows XP.
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