Examine source code of Rainforest Waterfall

{
  "name": "Rainforest-Waterfall",
  "manifest_version": 2,
  "version": "1.0",
  "theme": {
    "images": {
      "theme_frame": "Rainforest-Waterfall.png"
    },
    "colors": {
      "frame": "rgba(94, 136, 235, 1)",
      "tab_background_text": "rgba(83, 217, 195, 1)",
      "toolbar": "rgba(196, 230, 229, 1)",
      "bookmark_text": "rgba(252, 47, 99, 1)",
      "toolbar_field": "rgba(133, 51, 51, 1)",
      "toolbar_field_text": "rgba(176, 144, 144, 1)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{825a6415-aa2e-4cc1-861c-b220692ed413}"
    }
  }
}