Examine source code of Rogue

{
  "name": "Rogue",
  "manifest_version": 2,
  "version": "3.0",
  "theme": {
    "images": {
      "theme_frame": "Capture.JPG"
    },
    "colors": {
      "frame": "rgba(23, 32, 48, 1)",
      "tab_background_text": "rgba(135, 182, 191, 1)",
      "toolbar": "rgba(43, 53, 68, 1)",
      "bookmark_text": "rgba(189, 106, 116, 1)",
      "toolbar_field": "rgba(97, 114, 126, 1)",
      "toolbar_field_text": "rgba(251, 227, 168, 1)",
      "tab_line": "rgba(135, 182, 191, 1)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{4f63ff75-d67e-4ed5-8450-31f7af125151}"
    }
  }
}