Examine source code of JWT Viewer & Decoder

{
  "manifest_version": 3,
  "name": "JWT Viewer & Decoder",
  "version": "1.0.0",
  "default_locale": "en",
  "description": "Finds, displays, decodes, and copies JWT tokens on the current page.",
  "permissions": [
    "activeTab",
    "scripting",
    "cookies"
  ],
  "host_permissions": [
    "<all_urls>"
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "jwt-viewer-decoder@lotarion.local",
      "strict_min_version": "140.0",
      "data_collection_permissions": {
        "required": [
          "none"
        ],
        "optional": []
      }
    }
  },
  "icons": {
    "16": "icon-16.png",
    "32": "icon-32.png",
    "48": "icon-48.png",
    "128": "icon-128.png"
  },
  "action": {
    "default_title": "JWT Viewer & Decoder",
    "default_popup": "popup.html",
    "default_icon": {
      "16": "icon-16.png",
      "32": "icon-32.png",
      "48": "icon-48.png"
    }
  }
}