Examine source code of Falling Leafs

{
  "name": "Falling Leafs",
  "manifest_version": 2,
  "version": "3.0",
  "theme": {
    "images": {
      "theme_frame": "leafs-1.png"
    },
    "colors": {
      "frame": "rgba(229, 230, 232, 1)",
      "tab_background_text": "rgba(255, 255, 255, 1)",
      "toolbar": "rgba(3, 176, 0, 0.34)",
      "bookmark_text": "rgba(255, 255, 255, 1)",
      "toolbar_field": "rgba(176, 28, 142, 0.61)",
      "toolbar_field_text": "rgba(255, 255, 255, 1)",
      "tab_line": "rgba(66, 184, 168, 1)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{c17b4e15-b8d3-476f-8d65-471c1be9603a}"
    }
  }
}