Examine source code of chibi megumin

{
  "name": "megumin",
  "manifest_version": 2,
  "version": "1.0",
  "theme": {
    "images": {
      "theme_frame": "PngItem_316948(1)(1).png"
    },
    "colors": {
      "frame": "rgba(189, 103, 100, 1)",
      "tab_background_text": "rgba(0, 0, 0, 1)",
      "toolbar": "rgba(0, 0, 0, 0)",
      "toolbar_field": "rgba(255, 229, 97, 0.62)",
      "toolbar_field_text": "rgba(0, 0, 0, 1)",
      "tab_line": "rgba(255, 229, 97, 0.62)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{9fb287bf-d4d0-4de8-bade-b25cd651d1f3}"
    }
  }
}