Examine source code of KitaKitune4

{
  "name": "KitaKitune4",
  "manifest_version": 2,
  "version": "1.0",
  "theme": {
    "images": {
      "theme_frame": "header.jpg"
    },
    "colors": {
      "frame": "rgba(0, 0, 0, 1)",
      "tab_background_text": "rgba(217, 248, 255, 1)",
      "toolbar": "rgba(255, 255, 255, 0.13)",
      "bookmark_text": "rgba(120, 197, 245, 1)",
      "toolbar_field": "rgba(105, 10, 10, 1)",
      "toolbar_field_text": "rgba(214, 228, 255, 1)",
      "tab_line": "rgba(47, 138, 250, 1)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{cae9fafa-0651-46f4-8a59-de174fd9d5d3}"
    }
  }
}