Examine source code of Acumen Nation TFE

{
  "name": "Acumen Nation TFE",
  "manifest_version": 2,
  "version": "2.0",
  "theme": {
    "images": {
      "theme_frame": "acunat theme 2.0 test.png"
    },
    "colors": {
      "frame": "rgba(20, 20, 19, 1)",
      "tab_background_text": "rgba(102, 152, 94, 1)",
      "toolbar": "rgba(47, 50, 95, 0.3)",
      "bookmark_text": "rgba(103, 142, 191, 1)",
      "toolbar_field": "rgba(255, 252, 242, 0.75)",
      "toolbar_field_text": "rgba(28, 28, 28, 1)",
      "tab_line": "rgba(48, 50, 97, 1)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{0088b02d-11b0-4e89-8014-d60ec7b17fa6}"
    }
  }
}