Examine source code of Netlas.io

{
  "manifest_version": 2,
  "name": "Netlas.io",
  "description": "The Netlas.io plugin gives you information about where the website is hosted, who owns the IP and what other services and ports are open.",
  "version": "1.1",
  "icons": {
    "16": "images/icon-16.png",
    "32": "images/icon-32.png",
    "48": "images/icon-48.png",
    "128": "images/icon-128.png"
  },
  "browser_action": {
    "default_icon": "images/icon-32.png",
    "default_popup": "popup/popup.html"
  },
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "content_scripts": [
    {
      "matches": [
        "*://*/*"
      ],
      "js": [
        "get_theme.js"
      ]
    }
  ],
  "permissions": [
    "storage",
    "tabs",
    "webRequest",
    "unlimitedStorage",
    "*://*/*"
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "{1d4cfc0f-3188-43d9-bff5-d6cc77eb8669}"
    }
  }
}