Examine source code of Rainbow Dreamm

{
  "theme": {
    "images": {
      "theme_frame": "4.jpg"
    },
    "colors": {
      "frame": "#828282",
      "tab_background_text": "#4f4c4c"
    }
  },
  "version": "2.0",
  "name": "Rainbow Dreamm",
  "manifest_version": 2,
  "description": "always believe that a beautiful rainbow will come out after the big storm---dedicated to Japanese Earthquake"
}