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Where did you install Firefox from? Help Mozilla uncover 3rd party websites that offer problematic Firefox installation by taking part in our campaign. There will be swag, and you'll be featured in our blog if you manage to report at least 10 valid reports!

This site will have limited functionality while we undergo maintenance to improve your experience. If an article doesn't solve your issue and you want to ask a question, we have our support community waiting to help you at @FirefoxSupport on Twitter and/r/firefox on Reddit.

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Featured Articles

Secure connection failed and Firefox did not connect

If a website requires a secure connection that cannot be established, Firefox will not connect to protect you and will show you an error page. Learn more.

Common Myths about Private Browsing

Learn more about common misconceptions about Private Browsing in Firefox.

Back up and transfer your Firefox data to a new device

Learn how to transfer your browser data when switching devices using Firefox Sync. Back up your bookmarks, history, passwords, etc. with your Mozilla account.

Make Firefox your default browser on Windows

Learn how to make Firefox your default Web browser on Windows 10 and Windows 11.

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