There might be embedders that legitimately don't want to expose this, but in the general case I don't think this should be hard-locked on the Beta/Release vs. Nightly GeckoView distinction and tied to a runtime setting instead that the embedding app could then enable/disable as desired.
Bug 1540065 Comment 0 Edit History
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There might be embedders that legitimately don't want to expose this, but in the general case I don't think this should be hard-locked on the Beta/Release vs. Nightly GeckoView distinction, and tied to a runtime setting instead that the embedding app could then enable/disable as desired.