Bug 977371 - Allow more than 2^20 blockids (r=jorendorff)
Bug 962608 - Make PL_DHashTableInit infallible by default. r=briansmith,bsmedberg,ehsan,froydnj,jduell,jfkthame,roc,smaug
Bug 975037, part 1 - Inline nsPersistentProperties::Init. r=froydnj
Bug 975037, part 2 - Use smart pointers in nsPersistentProperties. r=froydnj
Bug 975037, part 3 - Remove trailing whitespace from nsPersistentProperties. r=froydnj
Bug 976651 - Encapsulate the Read of a new nsXBLPrototypeBinding::Read a little better. r=mrbkap
Bug 950266 - Re-enable the WebRTC tests disabled for nuwa issues r=jesup,ryanvm
Bug 975570 - Measure with telemetry how many times people interact with about:newtab. r=ttaubert
Bug 975959 - Do not pre-tenure objects when Ion expects them in the nursery; r=jandem

--HG--
extra : rebase_source : ffd3d556f603c1e01a837c792a90e422b7a37f8b
Bug 977538 - Disable PGO for CanonicalizeNaN. r=luke

--HG--
extra : rebase_source : 7be8e2eb69297cafa8e705c738e9ed814ad50308
Bug 975876 - Allow GC in ~AutoMaybeTouchDeadZones to touch dead zones (r=luke)
Merge inbound to m-c