Examine source code of Forest Memory

{
  "theme": {
    "images": {
      "theme_frame": "bojentsi13000x200-Copy.jpg"
    },
    "colors": {
      "frame": "#488733",
      "tab_background_text": "#f7fff9"
    }
  },
  "version": "2.0",
  "name": "Forest Memory",
  "manifest_version": 2
}