Examine source code of Chibi Ursula

{
  "name": "Chibi Ursula",
  "manifest_version": 2,
  "version": "1.0",
  "theme": {
    "images": {
      "theme_frame": "Chibi Ursula.png"
    },
    "colors": {
      "frame": "rgba(0, 0, 0, 1)",
      "tab_background_text": "rgba(63, 120, 176, 1)",
      "toolbar": "rgba(0, 0, 0, 0)",
      "bookmark_text": "rgba(113, 40, 163, 1)",
      "toolbar_field": "rgba(0, 0, 0, 0)",
      "toolbar_field_text": "rgba(201, 30, 150, 1)",
      "tab_line": "rgba(188, 216, 245, 1)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{8ec400ba-15e5-4d66-815b-2b8869e884d4}"
    }
  }
}