1690518 - [Experiment] The "Set as Default" notification is wrongly displayed even if the "Always check if Firefox is your default browser" option is unchecked

Status: VERIFIED FIXED

(Firefox :: Messaging System, defect, P1)

Description

[Marius Coman [:mcoman], Ecosystem QA]

Attachment: rec of the issue2.gif

[Affected versions]:

• Firefox Nightly 87.0a1 - Build ID: 20210203093146

[Affected Platforms]:

• Windows 10 x64
• Mac 10.15
• Linux Mint 20

[Prerequisites]:

• The browser is not set as default.
• Have this user.js saved to your PC.

[Steps to reproduce]:

1. Create a new profile but do not open the browser.
2. Go to the profile folder and paste the "user.js" from prerequisites.
3. Navigate to the "about:preferences" page.
4. Uncheck the "Always check if Nightly is your default browser" option from the "General" section.
5. Open a "New Tab" and observe the behavior.

[Expected result]:

• The "Set as Default" notification is not displayed.

[Actual result]:

• The "Set as Default" notification is displayed in the top part of the page.

[Additional Notes]:

• After following the steps from above, the "Set to Default" experiment notification will be redisplayed after each 24h.
• This issue is not reproducible with the existing "Set as Default" feature notification.
• Attached a screen recording of the issue.

Comment 1

[Andrei Oprea [:andreio]]

Issue was around experiment targeting which has been updated.

Comment 2

[Marius Coman [:mcoman], Ecosystem QA]

I have verified that this issue is no longer reproducible with the latest Firefox Beta (86.0b7 Build ID - 20210207185447) and the latest Firefox Nightly (87.0a1 Build ID - 20210209092956) installed on Windows 10 x64, macOS 10.15.7, and Linux Mint 20 x64. Now, I can confirm that the "Set as Default" infobar is not triggered if the "Always check if Firefox is your default browser" option from the "about:preferences" page is unchecked.

Comment 3

[Thomas Deutschmann]

Today I saw that bar for the first time on Windows in Firefox 87.0 release build although "Always check if Firefox is your default browser" is and was unchecked.

Comment 4

[Ed Lee :Mardak]

(In reply to Thomas Deutschmann from comment #3)

Today I saw that bar for the first time on Windows in Firefox 87.0 release build although "Always check if Firefox is your default browser" is and was unchecked.

You're probably seeing bug 1703874.