Per bug 1289872 comment 11, we should revert the changes to registerElement in the webidl  so that b2g consumers of the old API with the special web components permission don't break.  https://dxr.mozilla.org/mozilla-central/rev/ffac2798999c5b84f1b4605a1280994bb665a406/dom/webidl/Document.webidl#274
probably not revert, but modify register element somehow so that when b2g stuff is enabled we can support it.
I wonder if we still need this...
Due to b2g isn't supported, close as wontfix.
Status: NEW → RESOLVED
Last Resolved: 2 years ago
Resolution: --- → WONTFIX
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