** {{Bug|1070744}} - Implement AnimationPlayer playback control
*** We expect to get close to done in Q4, but may spill over.
* Moz2D Layout Conversion
** Gut nsRederingContext to leave it with only GetDrawTarget() and ThebesContext() methods
** Port consumers of the gfxContext fill and stroke methods to directly use Moz2D
** Port consumers of the gfxContext path creation functions to directly use Moz2D
* CSS Grid