MDN URL

https://developer.mozilla.org/en-US/docs/Learn_web_development/Extensions/Forms/Customizable_select

What specific section or headline is this issue about?

https://developer.mozilla.org/en-US/docs/Learn_web_development/Extensions/Forms/Customizable_select#customizing_other_classic_select_features

What information was incorrect, unhelpful, or incomplete?

There isn't currently any support specified for the multiple attribute on customizable <select> elements, but this will be worked on in the future.

What did you expect to see?

Listbox selects aka <select multiple> and <select size="3"> are both now supported in base appearance mode by chromium 145+.

So I would expect the content to reflect that, at the very least it shouldn't say they're explicitly not supported, but ideally it should go into more details.

Worth noting that <select multiple size="1"> doesn't yet support appearance:base-select.

Do you have any supporting links, references, or citations?

https://chromestatus.com/feature/6222145025867776

mdn/browser-compat-data#29183 - relevant data issue.

Do you have anything more you want to share?

No response

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