Debugged this is the expected flow for control and treatment branch. In Fx89 , attribution user agent is only set for non-experiment flow as a result primary label of import screen always display no attribution label 'Import fro previous browser' for control-89 and 'Start Import' for treatment-88 https://searchfox.org/mozilla-release/source/browser/components/newtab/aboutwelcome/AboutWelcomeChild.jsm#235
Bug 1713269 Comment 4 Edit History
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Debugged this is the expected flow for control and treatment branch. In Fx89 , attribution user agent is only set for non-experiment flow as a result in an experiment primary label of import screen always display no attribution label 'Import fro previous browser' for control-89 and 'Start Import' for treatment-88 https://searchfox.org/mozilla-release/source/browser/components/newtab/aboutwelcome/AboutWelcomeChild.jsm#235
Debugged this is the expected flow for control and treatment branch. In Fx89 , attribution user agent is only set for non-experiment flow as a result in an experiment primary label of import screen always display no attribution label 'Import from previous browser' for control-89 and 'Start Import' for treatment-88 https://searchfox.org/mozilla-release/source/browser/components/newtab/aboutwelcome/AboutWelcomeChild.jsm#235