The survey is not launched after the study expiration nor after user disable

[SoftVision-CarmenFat]

[Notes]:

• This report is for tracking purpose.
• This issue is reproducible on all the 3 branches.
• The survey appearance cannot be tested when the study expires due to issue #8.

[Affected versions]:

• Firefox 62.0b7

[Affected Platforms]:

• All Windows
• All Linux
• All Mac

[Prerequisites]:

• Have a new Firefox profile with the latest version of the "Federated Learning" add-on installed.
• Have the 'extensions.legacy.enabled' pref set to 'true'.

[Steps to reproduce]:

1. Open the browser with the profile from prerequisites.
2. Navigate to "about:addons>Extensions" and click the "Federated Learning" add-on.
3. Click the "Remove" button and observe the behavior.

[Expected result]:

• The survey is launched in a new tab.

[Actual result]:

• The survey is not launched in a new tab.