Examine source code of Certria Validator

{
  "manifest_version": 2,
  "name": "Certria Validator",
  "version": "1.0.2resigned1",
  "description": "Certria Validator",
  "browser_action": {
    "default_icon": {
      "19": "/images/icon19.png",
      "38": "/images/icon38.png"
    },
    "default_title": "Certria Validator",
    "default_popup": "/content/popup.html"
  },
  "background": {
    "scripts": [
      "/background/index.js"
    ],
    "persistent": false
  },
  "icons": {
    "16": "/images/icon16.png",
    "48": "/images/icon48.png",
    "128": "/images/icon128.png"
  },
  "homepage_url": "https://certria.com",
  "permissions": [
    "alarms",
    "storage",
    "tabs",
    "*://seals.certria.com/*"
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "{2357d504-7194-4b56-85ab-d446dd57ed0f}"
    }
  }
}