1721614 - A blank onboarding screen is displayed when navigating back to about:welcome after pinning or setting as default

Status: VERIFIED FIXED

(Firefox :: Messaging System, defect, P1)

Description

[Ciprian Muresan [:cmuresan], Formerly of Ecosystem QA - please needinfo @mcoman for things regarding the team]

Attachment: blank onboarding page when navigating back after pinning or setting as default.gif

[Affected versions]:

• Firefox Release 90.0.1, BuildID 20210716144314
• Firefox Beta 91.0b5, BuildID 20210720190304
• Firefox Nightly 92.0a1, BuildID 20210720094604

[Affected Platforms]:

• Windows 10, v1903 and up
• macOS 10.11 and up

[Prerequisites]:

• Have Firefox installed on the machine.
• Have Firefox NOT set as default and not pinned to Dock or Taskbar.

[Steps to reproduce]:

1. Start the Firefox application from prerequisites using a clean new profile.
2. Pin Firefox to Taskbar or Dock.
3. Skip the remaining onboarding using Not now.
4. Click the Browser's Back button and observe the page.

[Expected results]:

• The Choose a theme slide is displayed.

[Actual results]:

• A blank onboarding slide is displayed.

[Notes]:

• The issue is also reproducible if you set Firefox as default instead of Pinning to Taskbar or Dock.
• The issue is also reproducible if you both Pin Firefox and Set as default.
• Attached a screen recording of the issue.

Comment 1

[Punam Dahiya [:pdahiya]]

Attachment: Bug 1721614 - Handle blank onboarding screen on navigating back from about:home

Comment 2

[Pulsebot]

Pushed by [e-mail]:
https://hg.mozilla.org/integration/autoland/rev/d1aeb4e830a9
Handle blank onboarding screen on navigating back from about:home r=andreio

Comment 3

[Cosmin Sabou [:CosminS]]

https://hg.mozilla.org/mozilla-central/rev/d1aeb4e830a9

Comment 4

[Ciprian Muresan [:cmuresan], Formerly of Ecosystem QA - please needinfo @mcoman for things regarding the team]

I have verified that the blank screen is no longed displayed when navigating back from about:home on the latest Nightly builds (BuildID 20210809213353) using Windows 10 and macOS 11.5.1, however it looks like now the "Choose a theme" slide is displayed twice when navigating through all the slides.
I've filed this behavior in Bug 1724887 and will close this as verified.