Examine source code of Cisdem Web Blocker Plus

{
  "manifest_version": 2,
  "name": "Cisdem Web Blocker",
  "description": "A free website blocker to block access to specific websites and help you stay focused.",
  "default_locale": "en",
  "version": "1.5.0",
  "icons": {
    "16": "icon16x16.png",
    "32": "icon32x32.png",
    "48": "icon64x64.png"
  },
  "permissions": [
    "nativeMessaging",
    "tabs",
    "storage"
  ],
  "browser_action": {
    "default_icon": {
      "16": "icon16x16.png",
      "32": "icon32x32.png",
      "48": "icon64x64.png"
    },
    "default_popup": "popup.html"
  },
  "background": {
    "scripts": [
      "bg.js"
    ],
    "persistent": false
  },
  "web_accessible_resources": [
    "popup.js",
    "popup.html"
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "{b72786f0-5c18-4988-854a-8b285a1aa2e4}"
    }
  }
}