1775041 - [Experiment] An "Uncaught (in promise) TypeError: window.AWWaitForMigrationClose is not a function" error is displayed in the "Browser Console" after an import action is performed from the ECO Import spotlight

Status: RESOLVED DUPLICATE of bug 1771048

(Firefox :: Messaging System, defect)

Description

[Marius Coman [:mcoman], Ecosystem QA]

Attachment: rec of the issue.gif

[Affected versions]:

• Firefox Release 100.0.2 - Build ID: 20220519220738
• Firefox Release 101.0.1 - Build ID: 20220608170832

[Affected Platforms]:

• Windows 10 x64
• macOS 11.6.2
• Linux Mint 20.2 x64

[Prerequisites]:

• Have the following prefs in the "about:config" page:
  • "nimbus.debug" pref set to "true".
• Have the "Browser Console" opened.

[Steps to reproduce]:

1. Open the browser with the profile from the prerequisites.
2. Navigate to the "about:studies?optin_slug=import-infrequent-eco2204-en&optin_branch=treatment-c&optin_collection=nimbus-preview" URL.
3. Restart the browser and click the "Import to Firefox" spotlight button.
4. Focus the "Browser Console" and observe if there are any errors displayed.

[Expected result]:

• There is no error displayed.

[Actual result]:

• The "Uncaught (in promise) TypeError: window.AWWaitForMigrationClose is not a function" error is displayed.

[Notes]:

• This issue is reproducible on all the "treatment" branches of the experiment.
• This issue is not reproducible if the import action is performed from the "File" browser menu.
• Attached a screen recording of the issue.