Examine source code of Fox Bubbles

{
  "theme": {
    "images": {
      "theme_frame": "bubbles.png"
    },
    "colors": {
      "frame": "#b3b1b1",
      "tab_background_text": "#bfbfbf"
    }
  },
  "version": "2.0",
  "name": "Fox Bubbles",
  "manifest_version": 2,
  "description": "New Age and clean looking theme that shows your support for the best browser out there."
}