QF18 summary

[classilla]

https://ehsanakhgari.org/blog/2017-08-04/quantum-flow-engineering-newsletter-18

Easy:
Linked: M1386199 https://hg.mozilla.org/mozilla-central/rev/57bea3a4495a eminently adaptable to 45, just to Runtime.h instead (JS)
M1383645 https://hg.mozilla.org/mozilla-central/rev/e1ec4e403b9d (JS)
M1383646 https://hg.mozilla.org/mozilla-central/rev/5f8790aae878 (JS)
M1385459 https://hg.mozilla.org/mozilla-central/rev/80647273e2f0 there is enough regression risk here it should be its own patch, and tested thoroughly (through at least a few CCs)

More involved:
https://bugzilla.mozilla.org/show_bug.cgi?id=1385478
https://bugzilla.mozilla.org/show_bug.cgi?id=1383647

[classilla]

M1385459 caused startup crashes. Not implementing.

[classilla]

M1386199 was also done.