Bug 906839 - enable by default social.allowMultipleWorkers - update tests to work pref'd on and fix a missing update to the worker state, r=markh.
Bug 906839 - test fixes.  r=markh
Bug 906839 - disable one social test due to bug 919878. r=gavin
Bug 906839 - disable frameworker tests on ASAN builds, r=markh.