Bug 923409 - Draw FPS counter with a single GL call and eliminate last use of Copy2D program (r=BenWa).
Merge m-c to m-i
Bug 926266 - Bail in 900683.js when ParallelArray isn't defined
Bug 919885: Move Worker to WebIDL and thread-agnostic event dispatch. r=bent,bz
Bug 915757: Split GetListenerManager into two functions for more const-correctness. r=smaug
Bug 922896 - Fire tap immediately if content is not zoomable. r=kats
Backed out 2 changesets (bug 915757, bug 919885) for xpcshell bustage

Backed out changeset 5d17d90b838d (bug 915757)
Backed out changeset 91495d3a91c8 (bug 919885)