Examine source code of secured-webpage-verifier

{
  "manifest_version": 2,
  "name": "secured-webpages",
  "version": "1.0",
  "description": "Adds a green border to all safe webpages i.e, pages with matching with https://",
  "icons": {
    "48": "green-border.png"
  },
  "content_scripts": [
    {
      "matches": [
        "https://*/*"
      ],
      "js": [
        "blue-borderify.js"
      ]
    }
  ]
}