Firefox fails the web platform tests at https://github.com/w3c/web-platform-tests/pull/4160 for all ways of making an element un-focusable, except removing it from the DOM. The spec mandates all such ways of making something un-focusable be treated equally: https://html.spec.whatwg.org/multipage/interaction.html#focus-fixup-rule-one Browsers are generally fairly inconsistent, as discussed in the web platform tests PR. But the most sensible behavior to converge on is the spec's behavior, which is uniform across all the different ways of making something not-focusable.
Status: NEW → RESOLVED
Last Resolved: a year ago
Resolution: --- → DUPLICATE
Duplicate of bug: 570835
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