These messages should be removed as this will be an off-train experiment.
Bug 1797364 Comment 3 Edit History
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We may need to rethink how we handle these messages. This will be an off-train experiment, but we're also handling tour progress using a pref. Also, the messages here only represent one of the [two treatments](https://mozilla-hub.atlassian.net/wiki/spaces/FPS/pages/12492490/PDF.js+annotations+-Fx+108).
We'll want to think about how we're handling using prefs for tour progress in the context of experiments.