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Firefox warns you when a login form is not secure and your information could be stolen.
A Refresh can fix many issues by restoring Firefox to its default state while saving essential information like bookmarks and passwords.
Since the release of Firefox version 52 in March 2017, NPAPI plugins no longer load, except for Adobe Flash. Learn more about this change.
Firefox automatically updates itself by default but you can always do a manual update. Learn how to update Firefox on Windows, Mac or Linux.