Clarify argument in widget click handler
Allow page-workers' postMessage to be queued, remove issue from docs
Merge pull request #899 from erikvold/master

Bug 854768: fix fromIterator for Set (typo correction). r=Mossop
Log unhandled `error` events as errors.
Merge pull request #852 from jsantell/page-worker-postMessage-queue-757612

Fix Bug 757612 - page-worker postMessage has a timing issue, a=@ZER0
Merge pull request #846 from jsantell/widget-click-docs-675913

Fix Bug 675913: Clarify argument in widget click handler, a=@ochameau
Merge pull request #900 from Gozala/bug/error-events@821042

fix Bug 821042 - Unhanhled error events should be logged r=@erikvold
Bug 855354: Stop using chrome console object in content script API implementation.
Update credits.md
Merge pull request #904 from ochameau/bug855354

Bug 855354: Stop using chrome console object in content script API implementation. r=@Mossop