1958510 - The Wallpaper styles are not displayed in the Personalization Menu when enabling the “customWallpaper” feature configuration via Nimbus on the Stage server

Status: RESOLVED FIXED

(Firefox :: New Tab Page, defect)

Description

[Alice Varro [avarro], Ecosystem QA]

Attachment: no wallpaper.png

[Affected versions]:

• Firefox Beta 138.0b2, Build ID: 20250402091540

[Affected Platforms]:

• Windows 10 x64
• macOS 14.5
• Ubuntu 22.04 LTS

[Prerequisites]:

• Have a new profile created and opened.
• Have an experimenter ticket set on the Stage server enabling the “customWallpaper” feature config (example).

[Steps to reproduce]:

1. Open the browser from the prerequisites.
2. Navigate to the “about:config” page.
3. Set the “nimbus.debug” to true.
4. Navigate to “about:studies?optin_slug=feature-config-for-customwallpaper&optin_branch=treatment-d&optin_collection=nimbus-preview” link to enroll in the experiment.
5. Open a new Tab page.
6. Click the :Personalize New Tab” menu.
7. Observe the displayed wallpapers styles.

[Expected result]:

• All of the wallpaper styles are successfully displayed.

[Actual result]:

• None of the wallpaper styles are displayed on the menu using the Nimbus experiment on Stage.

[Notes]:

• The issue is not reproducible using this experiment in Prod.
• A screenshot of the issue is attached.

Comment 1

[Maxx Crawford [:maxx]]

Attachment: Bug 1958510 - Update newtabCustomWallpaper experiment filesize related prefs r?#home-newtab-reviewers

Comment 2

[Pulsebot]

Pushed by [e-mail]:
https://hg.mozilla.org/integration/autoland/rev/9348c0c097b8
Update newtabCustomWallpaper experiment filesize related prefs r=home-newtab-reviewers,thecount

Comment 3

[pstanciu]

https://hg.mozilla.org/mozilla-central/rev/9348c0c097b8

Comment 4

[Scott [:thecount] Downe]

Attachment: Bug 1958510 - Update newtabCustomWallpaper experiment filesize related prefs r?#home-newtab-reviewers

Original Revision: https://phabricator.services.mozilla.com/D245285

Comment 5

[Phabricator Automation]

beta Uplift Approval Request

• User impact if declined: Delay to release of custom wallpapers by 1 month
• Code covered by automated testing: yes
• Fix verified in Nightly: no
• Needs manual QE test: yes
• Steps to reproduce for manual QE testing: Teps to test in bug
• Risk associated with taking this patch: Low
• Explanation of risk level: It's a few changes to some Nimbus variables
• String changes made/needed: None
• Is Android affected?: no

Comment 6

[Pulsebot]

https://hg.mozilla.org/releases/mozilla-beta/rev/483bbdd5d55a

Comment 7

[Alice Varro [avarro], Ecosystem QA]

I have verified this issue using Firefox Nightly 139.0a1, build id: 20250414211452 and Firefox Beta 138.0b7, build id: 20250414092054 and I can still reproduce the issue. The Wallpaper styles are not displayed while being enrolled in an experiment using "customWallpaper" feature config on the Stage server.
Maxx, could you please take a look at it? Thank you!

Comment 8

[Maxx Crawford [:maxx]]

Alice,

I was able to successfully opt-in on Nightly (not Beta).

I did the following:

1. In (updated) Nightly, fresh profile

2. In about:config , update nimbus.debug to true

3. Install/open Remote Settings add-on

4. In the RS config page: Set to "Stage" and click "Clear All" and then "Sync"

5. Restart Nightly (may not be necessary)

6. Get about:studies?... recipe from experiment

     about:studies?optin_slug=feature-config-for-customwallpaper&optin_branch=treatment-d&optin_collection=nimbus-preview
   

7. Paste in new URL bar

8. Expected: Receive Opt-in was successful. message

9. Go to new tab, and try to upload a larger than 5MB custom wallpaper

10. Expected: See The image exceeded the file size limit of 5MB. Please try uploading a smaller file. error

Comment 9

[Alice Varro [avarro], Ecosystem QA]

Attachment: image_2025_04_16T06_38_58_500Z.png

Hi Max! I've retested this issue and it seems like after enroll now the Wallpaper styles are displayed but not correctly. When I logged this issue the Wallpaper styles were not displayed at all in the Wallpaper section. I've used a user.js file to enroll in the Stage experiment.
I'm attaching a screenshot of the issue.

Comment 10

[Scott [:thecount] Downe]

Alice, I think that's an unrelated issue to custom wallpapers or experiment enrolment.

Sometimes the network for remote settings is slow. We're aware of it but have a hard time reproducing it or tracking it down. Sometimes it take a bit before they are available when you have a new profile. Could this be what you are hitting? A restart probably fixes it.

Comment 11

[Alice Varro [avarro], Ecosystem QA]

I've verified the issue on Firefox Beta 138.0b8 and I've also restarted multiple times after enrolling in the experiment but I'm encountering the same issue.

Comment 12

[Scott [:thecount] Downe]

Alice, do you see the same issue with custom wallpapers off?