nsITaskbarPreviewButton
Provides access to a window preview’s toolbar button’s properties.
The button’s tooltip.
Default: an empty string
True if the array of previews should be dismissed when this button is clicked.
Default: false
True if the taskbar should draw a border around this button’s image.
Default: true
True if the button is disabled. This is not the same as visible.
Default: false
The icon used for the button.
Default: null
True if the button is shown. Buttons that are invisible do not
participate in the layout of buttons underneath the preview.
Default: false