Examine source code of Is visible.01

{
  "theme": {
    "images": {
      "theme_frame": "0819-papl-subete-l5.jpg"
    },
    "colors": {
      "frame": "#d5f2e7",
      "tab_background_text": "#ffffff"
    }
  },
  "version": "2.0",
  "name": "Is visible.01",
  "manifest_version": 2,
  "description": "Is visible.01\n\n\n0819-papl-subete-l5"
}