Examine source code of Water Butterfly

{
  "theme": {
    "images": {
      "theme_frame": "waterbutterfly.jpg"
    },
    "colors": {
      "frame": "#0e77e8",
      "tab_background_text": "#1177bf"
    }
  },
  "version": "2.0",
  "name": "Water Butterfly",
  "manifest_version": 2,
  "description": "Water Butterfly"
}