Examine source code of Less Waste Extension

{
  "manifest_version": 2,
  "name": "less-waste-extension",
  "description": "I save you money.Reduce waste is equivalent to earning. No privacy information is collected. Data is stored 100% locally.",
  "version": "1.0.5",
  "icons": {
    "16": "icon/16.png",
    "32": "icon/32.png",
    "48": "icon/48.png",
    "96": "icon/96.png",
    "128": "icon/128.png"
  },
  "permissions": [
    "storage",
    "notifications"
  ],
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "browser_action": {
    "default_title": "Reduce waste is equivalent to earning.",
    "default_popup": "popup.html"
  },
  "content_scripts": [
    {
      "matches": [
        "*://*.google.com/*"
      ],
      "js": [
        "content-scripts/content.js"
      ]
    }
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "{0e5b19db-08f9-46a3-a294-8073d47d6d10}"
    }
  }
}