They currently run both with and without: https://treeherder.mozilla.org/jobs?repo=mozilla-central&searchStr=telemetry-tests So the issue is that the non-fission task will also start running with it enabled. Once `fission` is default, maybe we can turn off the non-fission tasks. But to avoid a coordination dance, it's probably best to explicitly turn it off there for now.
Bug 1736859 Comment 14 Edit History
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They currently run both with and without: https://treeherder.mozilla.org/jobs?repo=mozilla-central&searchStr=telemetry-tests So the issue is that the non-fission task will also start running with it enabled. Once `fission` is default, maybe we can turn off the non-fission tasks. But to avoid a coordination dance, it's probably best to just explicitly turn it off there for now.