Examine source code of Winter Car Window

{
  "theme": {
    "images": {
      "theme_frame": "header.png"
    },
    "colors": {
      "frame": "#c7cffc",
      "tab_background_text": "#000000"
    }
  },
  "version": "2.0",
  "name": "Winter Car Window",
  "manifest_version": 2,
  "description": "Winter frosted car winter. Patterns in crystallized water coat the window of your car after a frozen winter evening."
}