Note that the video does not show exactly what I'm experiencing. The right edge of the Firefox window is at a little bit more at right of the "middle" of the secondary screen (say +500 pixels on the 900 pixels). And then I move right the mouse to the right edge of the secondary screen, the left side of my main screen disappear (dock included).
Note that the video does not show exactly what I'm experiencing. The right edge of the Firefox window is at a little bit more at right of the "middle" of the secondary screen (say +500 pixels on the 900 pixels). And then I move right the mouse to the right edge of the secondary screen, the left side of my main screen disappear (dock included).