Examine source code of Gex

{
  "name": "Gex",
  "manifest_version": 2,
  "version": "2.0",
  "theme": {
    "images": {
      "theme_frame": "thème firefox Gex 3.png"
    },
    "colors": {
      "frame": "rgb(22, 54, 75)",
      "tab_background_text": "rgb(148, 157, 173)",
      "toolbar": "rgba(68, 139, 102, 0.8)",
      "bookmark_text": "rgb(241, 255, 0)",
      "toolbar_field": "rgba(119, 58, 109, 0.2)",
      "toolbar_field_text": "rgb(255, 255, 255)",
      "tab_line": "rgb(28, 171, 176)"
    }
  }
}