The following tracks changes to Gecko's graphics code that have high potential to introduce regressions.

Gecko 48

Skia Content on Mac OS X

Description:	Change graphics back-end on Mac OS X from CoreGraphics to Skia
Contact:	Mason Chang (Dev), Anthony Hughes (QA)
Tracking Bug:	bug 1207332
Mailing List:	mozilla.dev.platform
How to Help:	...description of tests to run...
Issues:	If you experience rendering artifacts while browsing on Mac OS X, change gfx.content.azure.backends to cg in about:config and retest to confirm the issue is caused by Skia. If confirmed, please file a bug report which blocks bug 1207332. Bugzilla query error Array ( [type] => error [message] => http-bad-status [params] => Array ( [0] => 406 [1] => Not Acceptable ) ) 1

Description:	Enable asynchronous scrolling when dragging the scrollbar
Contact:	Benoit Girard (Dev), Anthony Hughes (QA)
Tracking Bug:	bug 1211610
Mailing List:	mozilla.dev.platform
How to Help:	...description of tests to run... 'apz.drag.enabled' to true and restart. test page: http://people.mozilla.org/~bgirard/scroll_no_paint.html (scrolling on this page is slow in FF because it hits a performance bugs in layer construction code. However with APZ the scrolling is smooth and a bit checkerboard-y instead. If you have 'layers.acceleration.draw-fps' set you should notice the left most FPS counter at 60 FPS while the middle counter will be much lower. This is APZ handling the scroll.)
Issues:	If you experience rendering artifacts while browsing on Mac OS X, change gfx.content.azure.backends to cg in about:config and retest to confirm the issue is caused by Skia. If confirmed, please file a bug report which blocks bug 1211610. Bugzilla query error Array ( [type] => error [message] => http-bad-status [params] => Array ( [0] => 406 [1] => Not Acceptable ) ) 1

Bug ID, Mailing list link, summary of issue, target milestone, testing/o&d tasks