Examine source code of Cold Christmas Red

{
  "name": "Cold Christmas Red",
  "manifest_version": 2,
  "version": "5.0",
  "theme": {
    "images": {
      "theme_frame": "ColdChristmasRedHCustom.jpg"
    },
    "colors": {
      "frame": "rgba(133, 37, 32, 1)",
      "tab_background_text": "rgba(255, 255, 255, 1)",
      "toolbar": "rgba(135, 41, 32, 0)",
      "bookmark_text": "rgba(255, 255, 255, 1)",
      "toolbar_field": "rgba(135, 41, 32, 0.07)",
      "toolbar_field_text": "rgba(255, 255, 255, 1)",
      "tab_line": "rgba(255, 0, 0, 1)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{5be39029-f455-41c6-a944-0b07b5dec072}"
    }
  }
}