Examine source code of Amazon Review Refiner

{
  "manifest_version": 2,
  "name": "Amazon Review Refiner",
  "version": "1.0.1",
  "browser_specific_settings": {
    "gecko": {
      "id": "amazon-review-refiner@example.com"
    },
    "gecko_android": {}
  },
  "description": "Intelligently filters and highlights authentic Amazon reviews",
  "permissions": [
    "storage",
    "activeTab",
    "*://*.amazon.com/*",
    "*://*.amazon.co.uk/*",
    "*://*.amazon.de/*",
    "*://*.amazon.ca/*",
    "*://*.amazon.in/*"
  ],
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "content_scripts": [
    {
      "matches": [
        "*://*.amazon.com/*",
        "*://*.amazon.co.uk/*",
        "*://*.amazon.de/*",
        "*://*.amazon.ca/*",
        "*://*.amazon.in/*"
      ],
      "css": [
        "styles.css"
      ],
      "js": [
        "thematicAnalyzer.js",
        "content.js"
      ],
      "run_at": "document_idle"
    }
  ],
  "browser_action": {
    "default_popup": "popup.html",
    "default_title": "Amazon Review Refiner",
    "default_icon": {
      "16": "icons/icon16.png",
      "48": "icons/icon48.png",
      "128": "icons/icon128.png"
    }
  },
  "icons": {
    "16": "icons/icon16.png",
    "48": "icons/icon48.png",
    "128": "icons/icon128.png"
  },
  "web_accessible_resources": [
    "Selectors.json",
    "thematicAnalyzer.js"
  ]
}