Examine source code of old flower pattern

{
  "theme": {
    "images": {
      "theme_frame": "firefoxflower.jpg"
    },
    "colors": {
      "frame": "#ba6161",
      "tab_background_text": "#db8a8a"
    }
  },
  "version": "2.0",
  "name": "old flower pattern",
  "manifest_version": 2
}