Wed Sep 2 2015 03:22:56 UTC
Reliable way to find out about why a feature could not be implemented. Search for the feature and "Boris Zbarsky"
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ID Product Comp Assignee Status Resolution Summary Changed
16527 CSS Regions stearns REOP --- [Shadow]: getFlowByName and shadow DOM 2014-11-20
One bug found.

as

File a new bug in the "Regions" component of the "CSS" product