Examine source code of Web Usage Badges

{
  "manifest_version": 2,
  "name": "Web Usage Badges",
  "version": "1.0",
  "description": "Earn badges based on your browsing habits (e.g., reading, learning).",
  "permissions": [
    "tabs",
    "<all_urls>",
    "storage"
  ],
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "browser_action": {
    "default_popup": "popup.html",
    "default_icon": {
      "48": "icon.png"
    }
  },
  "icons": {
    "48": "icon.png"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{332a9abe-0736-4f5a-91cb-1dd456e1f034}"
    }
  }
}