Bug 845966 - Detect more errors during FHR initialization; r=rnewman, a=bajaj

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extra : rebase_source : 551625b4219c76dfcfdb6c44fb9e0620c5fedf7c
Bug 844181 - Enable Firefox Health Report; r=mconnor, a=bajaj

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extra : rebase_source : 50d509273100ce49b03c57549430771565164ea8