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Since the release of Firefox version 52 in March 2017, NPAPI plugins no longer load, except for Adobe Flash. Learn more about this change.
Websites store things like your preferences, login status, and trackers in "cookies" on your computer. Learn how to manage cookies in Firefox.
Learn how to make Firefox your default browser in Windows 10.
If a website requires a secure connection that cannot be established, Firefox will not connect and will show you an error page. Learn more.