Examine source code of Highlighter Sync

{
  "manifest_version": 3,
  "name": "Highlighter Sync",
  "version": "0.5.3",
  "description": "Highlighter para Firefox: subraya texto en webs y ChatGPT, guarda notas y sincroniza con tu backend.",
  "permissions": [
    "storage",
    "identity"
  ],
  "host_permissions": [
    "http://*/*",
    "https://*/*"
  ],
  "icons": {
    "48": "src/assets/icon.svg",
    "96": "src/assets/icon.svg",
    "128": "src/assets/icon.svg"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "firefox-highlight-local@local",
      "strict_min_version": "140.0",
      "data_collection_permissions": {
        "required": [
          "none"
        ]
      }
    },
    "gecko_android": {
      "strict_min_version": "142.0"
    }
  },
  "background": {
    "service_worker": "src/background/background.js",
    "scripts": [
      "src/background/background.js"
    ]
  },
  "options_ui": {
    "page": "src/options/options.html",
    "open_in_tab": true
  },
  "content_scripts": [
    {
      "matches": [
        "<all_urls>"
      ],
      "js": [
        "src/shared/colors.js",
        "src/shared/page-key.js",
        "src/content/serialization.js",
        "src/content/restoration.js",
        "src/content/content-script.js"
      ],
      "css": [
        "src/content/content-style.css"
      ],
      "run_at": "document_idle"
    }
  ]
}