Bug 875496 - Simplify code that creates the newtab preload frame and remove unnecessary preload.xhtml; r=jaws
Bug 737446 -'null' is shown in installation popup instead of name obtained from AMO metadata. r=Unfocused
Merge m-c to fx-team
Bug 875441 - Don't keep reapplying the 2x scale in HiDPI mode when drawing the titlebar buttons. r=mattwoodrow
merge m-c to fx-team
Merge mozilla-central and birch