The initial state of a checkbox or radio button: true for selected,
false for unselected. Only one radio button can be selected at a time in
a given group.
Restricts the item to apply only to documents or frames whose URL matches
one of the given patterns. For details on pattern formats, see Match
Patterns.
A function that is called back when the menu item is clicked. This is not
available inside of a service worker; instead, they should register a
listener for contextMenus.onClicked.
The text to display in the item; this is required unless type is
separator. When the context is selection, use %s within the string
to show the selected text. For example, if this parameter's value is
"Translate '%s' to Pig Latin" and the user selects the word "cool", the
context menu item for the selection is "Translate 'cool' to Pig Latin".