Examine source code of CB Retro

{
  "manifest_version": 2,
  "version": "1.0",
  "name": "CBretro",
  "theme": {
    "images": {},
    "properties": {},
    "colors": {
      "toolbar": "rgb(65, 24, 138)",
      "toolbar_text": "rgb(255, 0, 241)",
      "frame": "rgb(35, 15, 72)",
      "tab_background_text": "rgb(255, 0, 241)",
      "toolbar_field": "rgb(44, 0, 53)",
      "toolbar_field_text": "rgb(255, 255, 255)",
      "tab_line": "rgb(255, 255, 255)",
      "popup": "rgb(43, 18, 83)",
      "popup_text": "rgb(214, 0, 255)",
      "tab_loading": "rgb(255, 255, 255)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{0995c597-b7ce-4a62-af52-1cf39cbb2e2b}"
    }
  }
}