Examine source code of Wizard Browser extension

{
  "manifest_version": 3,
  "name": "GitHub Wizard",
  "version": "2.5",
  "description": "",
  "icons": {
    "128": "icon.png"
  },
  "permissions": [
    "storage",
    "tabs"
  ],
  "content_scripts": [
    {
      "matches": [
        "https://github.com/*"
      ],
      "js": [
        "./index.js"
      ],
      "css": [
        "./styles.css"
      ]
    }
  ],
  "action": {
    "default_popup": "./popup/popup.html"
  },
  "background": {
    "scripts": [
      "background.js"
    ],
    "preferred_environment": [
      "service_worker"
    ]
  },
  "host_permissions": [
    "https://github.com/*"
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "github-wizard@holdex.io",
      "strict_min_version": "136.0"
    }
  }
}