Pending resolution of <https://github.com/whatwg/html/issues/1237>.
I don't find webkit-playsinline in the source code. Has this been resolved?
It's still in the source code: Source/WebCore/html/HTMLAttributeNames.in However, we did make this change. We should probably remove the prefixed attribute at some point. *** This bug has been marked as a duplicate of bug 159283 ***