Examine source code of Two Dolphin

{
  "theme": {
    "images": {
      "theme_frame": "forefoxpersonadolphin.jpg"
    },
    "colors": {
      "frame": "#999999",
      "tab_background_text": "#333333"
    }
  },
  "version": "2.0",
  "name": "Two Dolphin",
  "manifest_version": 2,
  "description": "Two dolphin swimming on a pale blue background."
}