Examine source code of Email Validator

{
  "manifest_version": 2,
  "permissions": [
    "storage"
  ],
  "name": "Email Validator",
  "description": "Validate emails, check deliverability, and filter out blacklists, spam traps, and complainers to reduce bounce rates.",
  "version": "0.0.3",
  "browser_action": {
    "default_title": "Email Validator",
    "default_popup": "index.html"
  },
  "homepage_url": "https://outscraper.com",
  "icons": {
    "16": "logo16.png",
    "48": "logo48.png",
    "128": "logo128.png"
  },
  "background": {
    "scripts": [
      "background.js"
    ],
    "persistent": false
  },
  "content_scripts": [
    {
      "js": [
        "content_script.js"
      ],
      "matches": [
        "*://*/*"
      ],
      "run_at": "document_idle"
    }
  ],
  "web_accessible_resources": [
    "logo16.png",
    "logo48.png",
    "logo128.png"
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "{9535471c-f617-4949-b924-09c93724372e}"
    }
  }
}