Mark :autofill as partially implemented in Firefox#28899
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caugner
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Jan 23, 2026
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Summary
Mark
:autofillas partially implemented in Firefox because it doesn't match for autocompleted fields.Test results and supporting details
The status of this feature came up on the WebDX call yesterday (see also web-platform-dx/web-features#3226). After some discussion, I concluded that the regression would be correct to do and the partial should be reflected in BCD.
No one opposed this, though there was a suggestion to record this as a behavioral subfeature. After mulling this over a bit, I do not think that a behavioral subfeature is a good fit here (this is not evolution and the context, such as it is, is a rather fine distinction between autofill and autocomplete).
Checklist
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"partial_implementation": truewhen all of the following conditions are met:autocompletebehavior.The breadth of negative impact on developers is difficult to gauge but, we have some evidence that suggests this may affect a lot of developers and sites:
:autofillbeing used on >2% of page loadsRelated issues
autofillto advance to Baseline high web-platform-dx/web-features#3226