Bugzilla

Here are my findings

With landing of 1592671, setting trailhead.firstrun.branches to 'join' no longer hides triplets on new tab for new users essentially muting the fix here https://bugzilla.mozilla.org/show_bug.cgi?id=1571624#c4

With 1592671, if branches pref is not set interrupt is set to default 'join' and triplets are set set to default 'supercharge'
https://searchfox.org/mozilla-central/source/browser/components/newtab/lib/ASRouterPreferences.jsm#24

The "without triplets" perf measure can be done now by running talos with trailhead.firstrun.branches='join-none' pref to match the common case behavior of users not seeing triplets.  Will submit patch to fix awsy pref here https://searchfox.org/mozilla-central/source/testing/awsy/conf/prefs.json#13

Here are my findings

With landing of 1592671, setting trailhead.firstrun.branches to 'join' no longer hides triplets on new tab for new users essentially muting the fix here https://bugzilla.mozilla.org/show_bug.cgi?id=1571624#c4

With 1592671, if branches pref is not set interrupt is set to default 'join' and triplets are set set to default 'supercharge'
https://searchfox.org/mozilla-central/source/browser/components/newtab/lib/ASRouterPreferences.jsm#24

The "without triplets" perf measure can be done now by running talos with trailhead.firstrun.branches='join-none' pref to match the common case behavior of users not seeing triplets.  Will submit patch to fix pref here https://searchfox.org/mozilla-central/source/testing/awsy/conf/prefs.json#13

Here are my findings

With landing of 1592671, setting trailhead.firstrun.branches to 'join' no longer hides triplets on new tab for new users essentially muting the fix here https://bugzilla.mozilla.org/show_bug.cgi?id=1571624#c4

With 1592671, if branches pref is not set interrupt is set to default 'join' and triplets are set to default 'supercharge'
https://searchfox.org/mozilla-central/source/browser/components/newtab/lib/ASRouterPreferences.jsm#24

The "without triplets" perf measure can be done now by running talos with trailhead.firstrun.branches='join-none' pref to match the common case behavior of users not seeing triplets.  Will submit patch to fix pref here https://searchfox.org/mozilla-central/source/testing/awsy/conf/prefs.json#13