Bug 1108998 - Add label to share provider buttons. r=Gijs, a=sledru

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extra : rebase_source : 30e97571990cf5fc505433339e2744b5c82b8f7b
Bug 1062355 - Enable SH_LIMIT_CALL_STACK_DEPTH. r=jgilbert, a=sledru

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extra : rebase_source : 93e932120c1fb9cc68bdeaa5bcd19cabfbcbfd78