about:welcome experiments in 71 are controlled from firefox not normandy, and the normal build process makes the very late beta/rcs appear like a regular release build. To indicate to amplitude requests coming from first run experiments are from specific channel beta vs release — append channel in a utm term utm_campaign e.g. utm_campaign=firstrun-beta As of now utm_campaign value is set to 'firstrun' and this change will update utm_campaign value to 'firstrun-<channel>' where channel is beta or release. For nightly or local dev , utm_campaign value stays as 'firstrun'
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about:welcome experiments in 71 are controlled from firefox not normandy, and the normal build process makes the very late beta/rcs appear like a regular release build. To indicate to amplitude requests coming from first run experiments are from specific channel beta vs release — append channel in a utm term utm_campaign e.g. utm_campaign=firstrun-beta As of now utm_campaign value is set to 'firstrun' and this change will update utm_campaign value to 'firstrun-<channel>' where channel is value such as nightly, beta or release picked from pref 'app.update.channel'