Discussion on expected a11y: https://mozilla.slack.com/archives/C4E0W8B8E/p1668118551293889
Bug 1787945 Comment 7 Edit History
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Discussion on expected a11y behavior: https://mozilla.slack.com/archives/C4E0W8B8E/p1668118551293889
Discussion on expected a11y behavior: https://mozilla.slack.com/archives/C4E0W8B8E/p1668118551293889 As discussed in the linked thread, both the dismiss button and the remaining content in the list item will be focusable. The dismiss button should be announced as "Close [tab title], button".