Examine source code of Fish Tropicali

{
  "theme": {
    "images": {
      "theme_frame": "FishTropicali.jpg"
    },
    "colors": {
      "frame": "#b4b4b4",
      "tab_background_text": "#99ff99"
    }
  },
  "version": "2.0",
  "name": "Fish Tropicali",
  "manifest_version": 2,
  "description": "Tropical fish include fish found in tropical environments around the world, including both freshwater and salt water species. Tropical fish are popular as aquarium fish, due to their often bright coloration."
}