Examine source code of Blooming Sakura Spring

{
  "name": "Blooming Sakura Spring",
  "manifest_version": 2,
  "version": "4.0",
  "theme": {
    "images": {
      "theme_frame": "BloomingSakuraSpringH.jpg"
    },
    "colors": {
      "frame": "rgba(48, 98, 148, 1)",
      "tab_background_text": "rgba(255, 255, 255, 1)",
      "toolbar": "rgba(0, 0, 0, 0)",
      "bookmark_text": "rgba(255, 255, 255, 1)",
      "toolbar_field": "rgba(48, 98, 148, 0.04)",
      "toolbar_field_text": "rgba(255, 255, 255, 1)",
      "tab_line": "rgba(0, 0, 0, 1)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{75462c86-4430-4f1c-8e26-0eb93f94b66a}"
    }
  }
}