Examine source code of Improved Metal-Archives

{
  "manifest_version": 3,
  "name": "ImprovedMetalArchives",
  "version": "1.0",
  "icons": {
    "48": "assets/logo-48.png",
    "96": "assets/logo-96.png"
  },
  "action": {
    "default_icon": "assets/logo-48.png",
    "default_title": "popup",
    "default_popup": "/dist/popup/popup.html"
  },
  "permissions": [
    "storage"
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "{16990893-ca9d-4640-9058-7da5e755e62f}",
      "data_collection_permissions": {
        "required": [
          "none"
        ]
      }
    }
  },
  "content_scripts": [
    {
      "matches": [
        "https://www.metal-archives.com/search?searchString=*"
      ],
      "js": [
        "/dist/content_scripts/search.js"
      ]
    },
    {
      "matches": [
        "https://www.metal-archives.com/bands/*/*"
      ],
      "js": [
        "/dist/content_scripts/similar.js"
      ]
    },
    {
      "matches": [
        "https://www.metal-archives.com/albums/*/*/*"
      ],
      "js": [
        "/dist/content_scripts/album.js"
      ]
    }
  ]
}