Examine source code of Swan Romance

{
  "name": "Swan Romance",
  "manifest_version": 2,
  "version": "3.0",
  "theme": {
    "images": {
      "theme_frame": "SwanRomanceH-Copy.jpg"
    },
    "colors": {
      "frame": "rgba(214, 214, 232, 1)",
      "tab_background_text": "rgba(0, 0, 0, 1)",
      "toolbar": "rgba(217, 217, 235, 0)",
      "bookmark_text": "rgba(0, 0, 0, 1)",
      "toolbar_field": "rgba(217, 217, 235, 0.08)",
      "toolbar_field_text": "rgba(0, 0, 0, 1)",
      "tab_line": "rgba(0, 0, 0, 1)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{b475c827-7454-40f9-af67-48bd1aaf97b9}"
    }
  }
}