Examine source code of hoverlooknary

{
  "manifest_version": 3,
  "name": "hoverlooknary",
  "version": "1.1.0",
  "description": "Show word definitions and IPA on hover.",
  "icons": {
    "48": "assets/48x48.png",
    "96": "assets/96x96.png",
    "128": "assets/128x128.png"
  },
  "permissions": [
    "storage"
  ],
  "host_permissions": [
    "<all_urls>"
  ],
  "action": {
    "default_title": "hoverlooknary",
    "default_icon": "hoverlooknary.png",
    "default_popup": "popup/popup.html"
  },
  "content_scripts": [
    {
      "matches": [
        "<all_urls>"
      ],
      "js": [
        "src/languages.js",
        "src/parser.js",
        "src/content-script.js"
      ],
      "css": [
        "src/tooltip.css"
      ],
      "run_at": "document_idle"
    }
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "hoverlooknary@torik.dev",
      "strict_min_version": "140.0",
      "data_collection_permissions": {
        "required": [
          "websiteContent"
        ],
        "optional": []
      }
    },
    "gecko_android": {
      "strict_min_version": "142.0"
    }
  }
}