On the RDM, I saw the video is rendered at the bottom on full screen state, so maybe it's not the same issue, but I narrowed it down but mozregression failed with 'taskId' error, probably it's due to 1655682. Anyways the range I got is; https://hg.mozilla.org/mozilla-central/pushloghtml?fromchange=dd1766e040a2db3cf1497ffe4b221e5082a831ee&tochange=2aa3b889d60386ac20e2a7ab7f315a742a2eea87 The most suspicious one is bug 1650488. That said, the change itself looks pretty reasonable to me. So there must be something badly relying on the async zoom container in full screen stuff. CCing kats.
Bug 1659761 Comment 6 Edit History
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On the RDM, I saw the video is rendered at the bottom on full screen state, so maybe it's not the same issue, but I narrowed it down but mozregression failed with 'taskId' error, probably it's due to bug 1655682. Anyways the range I got is; https://hg.mozilla.org/mozilla-central/pushloghtml?fromchange=dd1766e040a2db3cf1497ffe4b221e5082a831ee&tochange=2aa3b889d60386ac20e2a7ab7f315a742a2eea87 The most suspicious one is bug 1650488. That said, the change itself looks pretty reasonable to me. So there must be something badly relying on the async zoom container in full screen stuff. CCing kats.