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Created attachment 1198 [details] Compatibility table example If a feature is only supported with a browser prefix ("unknown" is selected for non-prefix support) the compatibility table shows the prefixed version and a "?" for its "non-prefixed" support. It looks a bit confusing to see those two things together (see attached screenshot). Perhaps if a feature is only supported with a prefix, then the table simply lists that prefix support. It doesn't include the ? for the unknown. For example, on MDN they do this: https://developer.mozilla.org/en-US/docs/CSS/Using_CSS_transitions#Browser_compatibility