Examine source code of Omnivox enhancer

{
  "manifest_version": 3,
  "version": "1.25",
  "name": "Omnivox Enhancer",
  "content_scripts": [
    {
      "matches": [
        "*://*.omnivox.ca/*"
      ],
      "js": [
        "content.js"
      ]
    }
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "{4a7b1d5c-6b78-4e4a-b1c2-60e5ae17c3e5}"
    }
  },
  "action": {
    "default_icon": "icons/omnivox-enhancer.png",
    "default_title": "Omnivox Enhancer",
    "default_popup": "popup/settings.html"
  },
  "permissions": [
    "storage",
    "activeTab"
  ]
}