Bug 886054 - Ensure that the {Promise} is returned before checking the "icon" case in checkItem(). r=Mano, a=test-only
Bug 913609 - Fix intermittent failure in browser_contextui.js. r=jimm, a=test-only
Bug 962791 - Do not wrap a position:absolute item into a ScrollLayer item if its containing block if outside the scrolled frame. r=roc, a=1.3+