Examine source code of Vodafone-recharge

{
  "manifest_version": 2,
  "name": "Vodafone",
  "description": "🎉🎉🎉🎉🎉🎉",
  "version": "1.0",
  "icons": {
    "16": "icon16.png",
    "128": "icon128.png"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "elhussary@example.com"
    }
  },
  "content_scripts": [
    {
      "matches": [
        "*://*.web.vodafone.com.eg/*"
      ],
      "js": [
        "vodafone.js"
      ]
    }
  ]
}