manifest.json

{
    "name": "FB Calendar",
    "short_name": "FB Calendar",
    "version": "2.1.1",
    "manifest_version": 2,
    "description": "Extension to add select Facebook events to your Google Calendar with the click of a button!",
    "homepage_url": "http://github.com/anyazz",
    "icons": {
        "16": "icons/icon-16.png",
        "48": "icons/icon-48.png",
        "128": "icons/icon-128.png"
    },
    "page_action": {
        "default_icon": "icons/icon-48.png",
        "default_title": "FB Calendar",
        "default_popup": "popup.html"
    },
    "background": {
        "scripts": ["js/moment.js", "js/moment-timezone-data.js", "js/jquery-3.1.1.js", "js/background.js", "js/gapi-client.js"],
        "persistent": false
    },
    "content_scripts": [
        {
            "matches": ["*://www.facebook.com/events/*"],
            "js": ["js/moment.js", "js/moment-timezone-data.js", "js/jquery-3.1.1.js", "js/extension.js"]

    }],
    "content_security_policy": "script-src 'self' https://apis.google.com; object-src 'self'",
    "oauth2": {
        "client_id": "959780096527-3840ecdn47brr0lqefodnf9rt96uvqnd.apps.googleusercontent.com",
        "scopes": [
          "https://www.googleapis.com/auth/calendar", "profile"
        ]
    },

    "permissions": [
    "*://*.facebook.com/*",
    "*://facebook.com/*",
    "*://calendar.google.com/*",
    "tabs",
    "webNavigation",
    "identity",
    "identity.email",
    "https://*.googleapis.com/*",
    "https://*.googleusercontent.com/*"
    ]

}