Bug 889123 - Implement gaia pref to fix app permissions in nightly
Merge pull request #10750 from KevinGrandon/bug_889123_implement_webapps_pref

Bug 889123 - Implement gaia pref to fix app permissions in nightly
Bug 888715 - [SMS] [perf] Messages app is CPU hungry with huge SMS database r=borja

* use getElementById instead of querySelector with an attribute selector