"Permission denied to access property "target"" error is displaye in Browser Console when the player is Minimize or Maximized and also when the video is Paused or Played

[Softvision-VladBacia]

[Affected versions]:

• Firefox 54.0.1 and up
• Min-Vid 1.0.10

[Affected Platforms]:

• All Windows
• All Mac
• All Linux

[Prerequisites]:

• Latest Min-Vid add-on (1.0.10) was previously installed on a clean profile.

[Steps to reproduce]:

1. Open the browser with the profile from prerequisites and navigate to one of the supported platforms (e.g www.youtube.com).
2. Send a video to the player.
3. Play/Pause the video.
4. Minimize/Maximize the Min-Vid player.

[Expected result]:

• No errors occur.

[Actual result]:

• Error: Permission denied to access property "target" is displayed in the console.

[Notes]:

• Attached a screen recording of the issue: