Examine source code of Clark Design

{
  "theme": {
    "images": {
      "theme_frame": "firefox-header.png"
    },
    "colors": {
      "frame": "#ffffff",
      "tab_background_text": "#ffffff"
    }
  },
  "version": "2.0",
  "name": "Clark Design",
  "manifest_version": 2,
  "description": "This was purely for Clark Design's PCs, but please feel free to download and support us!"
}