Examine source code of Carbon Pattern

{
  "theme": {
    "images": {
      "theme_frame": "test.png"
    },
    "colors": {
      "frame": "#e8e8e8",
      "tab_background_text": "#e8e8e8"
    }
  },
  "version": "2.0",
  "name": "Carbon Pattern",
  "manifest_version": 2,
  "description": "A simple yet elegant pattern for your browser."
}