Examine source code of Gauges by MaDonna

{
  "name": "Gauges by MaDonna",
  "manifest_version": 2,
  "version": "5.0",
  "theme": {
    "images": {
      "theme_frame": "header.png"
    },
    "colors": {
      "frame": "rgba(43, 13, 3, 1)",
      "tab_background_text": "rgba(252, 252, 138, 1)",
      "toolbar": "rgba(43, 13, 3, 0)",
      "bookmark_text": "rgba(252, 252, 138, 1)",
      "toolbar_field": "rgba(43, 13, 3, 0.03)",
      "toolbar_field_text": "rgba(252, 252, 133, 1)",
      "tab_line": "rgba(252, 252, 133, 1)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{5bdfb56b-ce19-42d2-976e-279ae47c245b}"
    }
  }
}