Bug 848180: fixing ptpb tests on Fennec and a minor regression where window.isPrivate would fail on Fennec
Bug 854465: Use in-XPI modules if a preference is set.
Merge pull request #890 from Mossop/bug854465

Bug 854465: Use in-XPI modules if a preference is set. r=gozala
Merge pull request #843 from erikvold/848180

Fix Bug 848180: fixing ptpb tests and window.isPrivate on Fennec r=@ochameau
Allow page-workers' postMessage to be queued, remove issue from docs