Examine source code of Grass and bubles

{
  "theme": {
    "images": {
      "theme_frame": "greengrass2.jpg"
    },
    "colors": {
      "frame": "#35630a",
      "tab_background_text": "#206e25"
    }
  },
  "version": "2.0",
  "name": "Grass and bubles",
  "manifest_version": 2,
  "description": "A litte freshness with green grass and blubles"
}