1911070 - [Experiment] Two infobars are displayed on "treatment-a" branch when first navigating on a webmail page that already exists in the Applications list

Status: VERIFIED FIXED

(Firefox :: Shell Integration, defect)

Description

[Cosmin Muntean [:cmuntean], Ecosystem QA]

Attachment: two infobars in treatment-a.mp4

[Affected versions]:

• Firefox RC 129.0 (Build ID: 20240729133145)
• Nightly 130.0a1 (Build ID: 20240730164742)

[Affected Platforms]:

• Windows 10
• Windows 11

[Prerequisites]:

• Have a Firefox en-US build installed.
• Have the following prefs set: "nimbus.debug" set to true.

[Steps to reproduce]:

1. Open the browser using the profile from the prerequisites.
2. In order to force enroll in the treatment-a branch, navigate to the following link: about:studies?optin_slug=improved-mailto-handling-with-os-integration&optin_branch=treatment-a&optin_collection=nimbus-preview
3. Close the tab with the link from Step 2.
4. Restart the browser.
5. Navigate to gmail.com and log in with a valid account.
6. Observe the infobar.

[Expected result]:

• Only one infobar is triggered.

[Actual result]:

• Two infobars are triggered.

[ Notes]:

• I have tried to find if this is a regression, but sometimes the issue is NOT reproducible on some Firefox profiles even if I follow the same steps.
• The issue is reproducible with any webmail that is added in the Application list before enrolling in the experiment.
• The issue is also reproducible by naturally enrolling in the experiment.
• The issue is not reproducible if the prefs are manually changed without enrolling in the experiment.
• The issue is not reproducible in the "treatment-b" branch.
• I did not manage to reproduce the issue on Firefox 128. I have tried to find a regression range but without luck.
• In the attached screen recording I have used another method to reproduce this issue to avoid using my personal Gmail account in the video.
• Attached is a screen recording of the issue.

Comment 1

[Vtay]

@[e-mail] can you update this bug with the workaround

Comment 2

[Max Christian Pohle [:/dev/max]]

I was able to reproduce the bug and after some time in the debugger it looks as if a small change could fix it. I will leave the needinfo for now and keep you updated while fixing it.

Comment 3

[Max Christian Pohle [:/dev/max]]

Attachment: Bug 1911070 - Two infobars are displayed, r?nalexander

Comment 4

[Pulsebot]

Pushed by [e-mail]:
https://hg.mozilla.org/integration/autoland/rev/eaaa2b1f0cc7
Two infobars are displayed, r=nalexander

Comment 5

[Sandor Molnar[:smolnar]]

https://hg.mozilla.org/mozilla-central/rev/eaaa2b1f0cc7

Comment 6

[BugBot [:suhaib / :marco/ :calixte]]

Since nightly and release are affected, beta will likely be affected too.
For more information, please visit BugBot documentation.

Comment 7

[Max Christian Pohle [:/dev/max]]

Attachment: Bug 1911070 - Two infobars are displayed, r?nalexander

Original Revision: https://phabricator.services.mozilla.com/D221394

Comment 8

[Max Christian Pohle [:/dev/max]]

Attachment: Bug 1911070 - Two infobars are displayed, r?nalexander

Original Revision: https://phabricator.services.mozilla.com/D221394

Comment 9

[Phabricator Automation]

beta Uplift Approval Request

• User impact if declined: The mailto experiment rollout would be delayed by one month (Bug 1910909)
• Code covered by automated testing: yes
• Fix verified in Nightly: no
• Needs manual QE test: no
• Steps to reproduce for manual QE testing: Enable the experiment and follow the step-by-step guide on the bug on how to reproduce it.
• Risk associated with taking this patch: Low risk
• Explanation of risk level: It fixes the bug and in a worst case scenario would not display the prompt rather than showing two. But that would trigger the automated tests if it happend and is very unlikely for that reason.
• String changes made/needed: no
• Is Android affected?: no

Comment 10

[Pulsebot]

https://hg.mozilla.org/releases/mozilla-beta/rev/77f3296129cf

Comment 11

[Cosmin Muntean [:cmuntean], Ecosystem QA]

I have verified this issue on the latest Nightly 132.0a1 build (Build ID: 20240911092134) on Windows 10 x64 and Windows 11 x64.

• Only one infobar is triggered after following the steps from the bug.

Considering this, I will mark the issue as verified-fixed.

Comment 12

[Max Christian Pohle [:/dev/max]]

Hi Cosmin Muntean! Thanks for checking so quickly.

Hi Vtay! I am clearing the needinfo flag with this bug fixed and validated.

Comment 13

[Cosmin Muntean [:cmuntean], Ecosystem QA]

I have verified this issue on the latest Beta 131.0b5 build (Build ID: 20240911093639) on Windows 10 x64 and Windows 11 x64.

• Only one infobar is triggered after following the steps from the bug.