Examine source code of PasteField

{
  "manifest_version": 3,
  "name": "PasteField",
  "version": "1.0.0",
  "description": "Adds a customizable paste button near text fields, with optional send actions.",
  "permissions": [
    "clipboardRead",
    "storage"
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "pastefield@mykaeld.local",
      "strict_min_version": "140.0",
      "data_collection_permissions": {
        "required": [
          "none"
        ]
      }
    },
    "gecko_android": {
      "strict_min_version": "142.0"
    }
  },
  "content_scripts": [
    {
      "matches": [
        "<all_urls>"
      ],
      "js": [
        "content.js"
      ],
      "css": [
        "style.css"
      ],
      "run_at": "document_idle"
    }
  ],
  "options_ui": {
    "page": "options/options.html"
  }
}