LayoutTests/http/tests/contentextensions/popups.html.json - WebKit - Git at Google

 [
     {
         "action": {
             "type": "block"
         },
         "trigger": {
             "url-filter": "about",
             "resource-type":["popup"]
         }
     }
 ]
	[
	{
	"action": {
	"type": "block"
	},
	"trigger": {
	"url-filter": "about",
	"resource-type":["popup"]
	}
	}
	]