The overlay is wrongly displayed on the suggested playlist when navigating to videos that are part of playlists

[SoftVision-CarmenFat]

[Affected versions]:

• Firefox Developer Edition 59.0b9
• Firefox Nightly 60.0a1 (02/14/2018)
• Min-Vid Shield Study Onboarding 0.4.7 - Shield Study

[Affected Platforms]:

• All Windows

[Prerequisites]:

• Latest Min-Vid v.0.4.7 Shield Study Onboarding ("active" or "activeAndOnboarding" variant) was previously installed on a clean profile.

[Steps to reproduce]:

1. Open the browser with the profiles from prerequisites and navigate to YouTube.
2. Click on one of the videos that are part of a Playlist (e.g. https://www.youtube.com/watch?v=Uxy2zXQdIIs)
3. Hover the suggested playlist thumbnail from the right side of the YouTube player and observe what happens next.

[Expected result]:

• The Min Vid overlay is not displayed.

[Actual result]:

• The Min Vid overlay is displayed.

[Notes]:

• Here is a screen recording of the issue:

[SoftVision-CarmenFat]

This issue is no longer reproducible on the latest Shield Study build.