Examine source code of Instagram popup Blocker

// JSON Document
{
	"manifest_version": 2,
	"name" : "Instagram Signout User Block Perventer",
	"version" : "1",
	"content_scripts": [
		{
			"matches": [
				"https://www.instagram.com/*",	
				"http://www.instagram.com/*"
			],
			"js": ["content.js"]
		}
	],
	"browser_action": {
		"default_icon": "logo.png"
	}
}