This should be why we're failing the WPT https://wpt.fyi/results/css/css-display/display-contents-dynamic-before-after-001.html
Bug 1418138 Comment 3 Edit History
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This should (at least partially) be why we're failing the WPTs: - https://wpt.fyi/results/css/css-display/display-contents-dynamic-before-after-001.html - https://wpt.fyi/results/css/css-display/display-contents-dynamic-before-after-first-letter-001.html Chrome and Safari both pass them.