Examine source code of VideoSyncer

{
  "manifest_version": 2,
  "name": "__MSG_app_name__",
  "default_locale": "en",
  "author": "ElectronicManuel",
  "description": "__MSG_app_description__",
  "short_name": "__MSG_app_shortname__",
  "browser_action": {
    "default_icon": "assets/img/logo.svg",
    "default_title": "VideoSyncer",
    "default_popup": "pages/browser-action/browser-action.html"
  },
  "web_accessible_resources": [
    "pages/oauth/login.html"
  ],
  "background": {
    "scripts": [
      "background/background.js"
    ],
    "persistent": true
  },
  "content_scripts": [
    {
      "matches": [
        "https://*/*",
        "http://*/*"
      ],
      "js": [
        "video-tracker/index.js"
      ],
      "all_frames": false
    }
  ],
  "content_security_policy": "script-src 'self'; object-src 'self'",
  "icons": {
    "16": "assets/img/logo16.png",
    "24": "assets/img/logo24.png",
    "32": "assets/img/logo32.png",
    "48": "assets/img/logo48.png",
    "64": "assets/img/logo64.png",
    "128": "assets/img/logo128.png",
    "256": "assets/img/logo256.png",
    "512": "assets/img/logo512.png"
  },
  "permissions": [
    "https://vsync.ch/oauth/*",
    "http://*/*",
    "https://*/*",
    "tabs",
    "storage",
    "webRequest",
    "webRequestBlocking"
  ],
  "applications": {
    "gecko": {
      "id": "{560ece31-4892-44b1-b1cc-331bad846f57}"
    }
  },
  "version": "7.2.7"
}