Issue 1593 - Extend workaround for Chrome bug breaking Flash videos to Chrome >=38
Issue 1592 - Fixed frame collapsing on Safari

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extra : amend_source : 7a621a28a73ab00cd41c54e63b6c87125fa275f2
Issue 1594 - Handle missing userInfo when processing contextmenu events on Safari
Issue 1603 - Register events for "Block element" with the capturing phase