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Firefox is no longer supported on Windows 8.1 and below.

Please download Firefox ESR (Extended Support Release) to use Firefox.

Firefox is no longer supported on macOS 10.14 and below.

Please download Firefox ESR (Extended Support Release) to use Firefox.

Firefox Privacy Notice

Opt-out of Convert experiments

Your privacy is very important to Mozilla. In an effort to improve user experiences on www.mozilla.org, Mozilla sometimes runs website experiments using a tool called Convert. Convert does not collect any personally identifiable information, is committed to data privacy and security, and does not share data with any parties other than Mozilla. You can read more information in the Mozilla Websites Privacy Policy and the Convert Privacy Policy.

If you still want to opt-out of Convert experiments on www.mozilla.org, you can do so by clicking the link below. The link will automatically replace Convert cookies and verify your opt-out status.

Opt-out of Convert experiments

If you change your mind, you can opt-in again here:

Opt-in to Convert experiments

Note: If you already have Do Not Track enabled then Convert will respect your preference, and you will not be entered into website experiments.