Examine source code of Amazon Price Tracker

{
  "manifest_version": 2,
  "name": "Price Tracker",
  "version": "1.0",
  "description": "Track prices of products on Amazon and get notified when they drop below your desired price.",
  "icons": {
    "16": "images/icon16.png",
    "32": "images/icon32.png",
    "48": "images/icon48.png",
    "128": "images/icon128.png"
  },
  "permissions": [
    "activeTab",
    "storage",
    "notifications",
    "alarms",
    "<all_urls>",
    "tabs",
    "http://*/*",
    "https://*/*"
  ],
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "browser_action": {
    "default_icon": {
      "128": "images/icon128.png"
    },
    "default_title": "Amazon Price Tracker",
    "default_popup": "popup.html"
  },
  "content_scripts": [
    {
      "matches": [
        "https://www.amazon.com/*"
      ],
      "js": [
        "content.js"
      ]
    }
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "{abf94add-07ba-4a04-8c71-84caf7bee9bd}"
    }
  }
}