Examine source code of OmLead Email Verifier

{
  "manifest_version": 2,
  "name": "OmLead Email Verifier",
  "version": "1.0.0",
  "description": "Instantly verify email addresses with a click. Right-click any email or use the popup to verify deliverability in real-time.",
  "browser_specific_settings": {
    "gecko": {
      "id": "omlead-verifier@omlead.com",
      "strict_min_version": "142.0",
      "data_collection_permissions": {
        "required": [
          "none"
        ]
      }
    }
  },
  "icons": {
    "16": "icons/icon16.png",
    "48": "icons/icon48.png",
    "128": "icons/icon128.png"
  },
  "browser_action": {
    "default_popup": "popup/popup.html",
    "default_icon": {
      "16": "icons/icon16.png",
      "48": "icons/icon48.png",
      "128": "icons/icon128.png"
    },
    "default_title": "OmLead Email Verifier"
  },
  "background": {
    "scripts": [
      "background/background.js"
    ]
  },
  "content_scripts": [
    {
      "matches": [
        "<all_urls>"
      ],
      "js": [
        "content/content.js"
      ],
      "css": [
        "content/content.css"
      ]
    }
  ],
  "permissions": [
    "storage",
    "contextMenus",
    "notifications",
    "https://app.omlead.com/*"
  ],
  "web_accessible_resources": [
    "icons/*.png"
  ],
  "developer": {
    "name": "OmLead",
    "url": "https://omlead.com"
  }
}