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Browser Requirements
Officially Supported
- Latest Stable Chrome
- Latest Stable Edge
- Latest Stable Safari
- At least 360 pixels of available page width
- Open Mastermind directly in your browser
May Work, but Not Officially Supported
- Older Versions of Chrome, Edge, and Safari
- Latest Stable Firefox
- Latest Stable Brave
- Android Chrome
These environments may work, but we do not guarantee full compatibility.
Not Supported
- The page needs at least 360 pixels of available width, including when you zoom or split the screen.
- In-App Browsers (Instagram, TikTok, Facebook, LINE, etc.)
- Internet Explorer and legacy Opera
Beta Compatibility Note
Use the latest Chrome, Edge, or Safari. Older versions, Firefox, Brave, and Chrome on Android may work, but are not officially supported. We may ask you to update your browser before investigating a problem. For speaking practice on iPhone or iPad, use Safari.