This I believe still has utility, to help investigate cases where we can't use keyed histograms to split out Fission and non-Fission(e.g., Cycle collection). This collection mechanism of this probe is identical to the the [site-origin probe](https://bugzilla.mozilla.org/show_bug.cgi?id=1589700). This should be collected in all cases, including scenarios where only Fission or non-Fission windows were used.
Bug 1602903 Comment 6 Edit History
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This I believe still has utility, to help investigate cases where we can't use keyed histograms to split out Fission and non-Fission(e.g., Cycle collection). This collection mechanism of this probe is identical to the [site-origin probe](https://bugzilla.mozilla.org/show_bug.cgi?id=1589700). This should be collected in all cases, including scenarios where only Fission or non-Fission windows were used.