Examine source code of my Tree

{
  "theme": {
    "images": {
      "theme_frame": "Pac_Man_Widescr.pdnggg.jpg"
    },
    "colors": {
      "frame": "#fa5757",
      "tab_background_text": "#f2eded"
    }
  },
  "version": "2.0",
  "name": "my Tree",
  "manifest_version": 2
}