Examine source code of Three Goldfinch

{
  "name": "Three Goldfinch",
  "manifest_version": 2,
  "version": "5.0",
  "theme": {
    "images": {
      "theme_frame": "header.png"
    },
    "colors": {
      "frame": "rgba(33, 51, 4, 1)",
      "tab_background_text": "rgba(243, 255, 82, 1)",
      "toolbar": "rgba(0, 0, 0, 0)",
      "bookmark_text": "rgba(255, 255, 84, 1)",
      "toolbar_field": "rgba(33, 51, 4, 0.06)",
      "toolbar_field_text": "rgba(255, 255, 0, 1)",
      "tab_line": "rgba(246, 255, 125, 1)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{92b6577a-0a42-48db-9339-6c9711b838b6}"
    }
  }
}