Examine source code of Baby Bird

{
  "name": "Baby Bird",
  "manifest_version": 2,
  "version": "1.0",
  "theme": {
    "images": {
      "theme_frame": "新規キャンバス.png"
    },
    "colors": {
      "frame": "rgba(216, 210, 203, 1)",
      "tab_background_text": "rgba(69, 34, 28, 0.65)",
      "toolbar": "rgba(238, 232, 225, 1)",
      "bookmark_text": "rgba(186, 41, 113, 0.83)",
      "toolbar_field": "rgba(252, 250, 249, 1)",
      "toolbar_field_text": "rgba(50, 13, 7, 1)"
    }
  }
}