Examine source code of gururin_basic

{
  "theme": {
    "images": {
      "theme_frame": "gururin_firefox2.png"
    },
    "colors": {
      "frame": "#b5b1b1",
      "tab_background_text": "#fcfcfc"
    }
  },
  "version": "2.0",
  "name": "gururin_basic",
  "manifest_version": 2,
  "description": "gururin Logo"
}