User Agent: Mozilla/5.0 (Windows NT 6.1; WOW64; rv:45.0) Gecko/20100101 Firefox/45.0 Build ID: 20160201143558 Steps to reproduce: about:config Change preference dom.webcomponents.enabled to true Go to https://gaming.youtube.com/ Firefox load only background site Actual results: https://gaming.youtube.com/ not load properly with webcomponents enabled
dom.webcomponents.enabled enables the old Web components implementation and API. The new API is being implemented (and the old one will never be released). We should either mark this invalid, or make this block the bugs which are about implementing the new API so that we ensure that the page still works with the new API. (I assume the page is just using the now-Google-only-deprecated-web-components-API.)
I marked it dependent upon the new Shadow DOM API but it'll require YouTube changing to that API at some point.
Depends on: 1205323
Whiteboard: dom-triaged → dom-triaged [platform-rel-Youtube]
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