Bug 1103627 - [System] Use a marionette client loader to include the system app r=etienne
Bug 928740 - Throw on missing strings during buildtime. r=gandalf r=@RickyChien f=flod f=sfoster f=kgrandon f=drs
Bug 1102954 - [L10n] Add support for aria-moz-hint. r=stas
Merge pull request #26411 from yzen/bug-1102954

[L10n] Add support for aria-moz-hint.
Merge pull request #25309 from stasm/928740-throw-on-missing-strings

Bug 928740 - Throw on missing strings during buildtime
Merge pull request #26383 from KevinGrandon/bug_1103627_marionette_client_loader_system

Bug 1103627 - [System] Use a marionette client loader to include the system app