1593655 - The "Extended Triplets" are no longer displayed on latest Firefox Nightly

Status: RESOLVED DUPLICATE of bug 1593652

(Firefox :: Messaging System, defect)

Description

[Marius Coman [:mcoman], Ecosystem QA]

Attachment: rec of the issue.gif

[Affected versions]:

• Firefox Nightly 72.0a1 - Build ID: 20191104094118

[Affected Platforms]:

• All Windows
• All Mac
• All Linux

[Prerequisites]:

• Have a new Firefox profile.

[Steps to reproduce]:

1. Open the browser with the profile from prerequisites.
2. Open a new tab and observe the top part of the page.

[Expected result]:

• The "Extended Tripplets" are displayed in the top right part of the page.

[Actual result]:

• The "Extended Tripplets" are not displayed at all.

[Regression Window]:

• Considering the fact that this issue is not reproducible on older Firefox builds, using the mozregression tool I have managed to find the following regression window:
  Last good revision: f9a4c8d67be3cbd983306cd90af9737a04cd50f1
  First bad revision: c142790318c4d8bfceebf2e828f950cb7a7412bb
  Pushlog:
  https://hg.mozilla.org/integration/autoland/pushloghtml?fromchange=f9a4c8d67be3cbd983306cd90af9737a04cd50f1&tochange=c142790318c4d8bfceebf2e828f950cb7a7412bb

From the pushlog it seems that bug 1590504 has caused this issue.

[Notes]:

• Attached a screen recording of the issue.

@Punam, could you please take a look over this issue?

Comment 1

[Punam Dahiya [:pdahiya]]

@marius can you please validate if you are seeing about:welcome screen for new profiles in nightly. For me its showing https://www.mozilla.org/en-US/firefox/nightly/firstrun/ page , probably the reason causing trailhead.extendedTriplets.experiment not getting set in nightly.

Comment 2

[Punam Dahiya [:pdahiya]]

Debugging further, this issue is seen in nightly because 'startup.homepage_welcome_url' pref is not set to 'about:welcome' in nightly.

https://searchfox.org/mozilla-central/source/browser/branding/nightly/pref/firefox-branding.js#8

Two ways for trailheadTriplet state to be set in messaging context is either from FirstRunPref 'trailhead.firstrun.branches' or
setupTrailHead method invoked when about:welcome screen opens.

https://searchfox.org/mozilla-central/source/browser/components/newtab/lib/ASRouter.jsm#996
https://searchfox.org/mozilla-central/source/browser/components/newtab/lib/ASRouter.jsm#1126

With trailheadTriplet state not set, message targeting for extended triplets is not satisfied in nightly