Examine source code of Compline

{
  "name": "Compline",
  "manifest_version": 2,
  "version": "1.0",
  "theme": {
    "images": {
      "theme_frame": "bg.png"
    },
    "colors": {
      "frame": "rgba(26, 29, 33, 1)",
      "tab_background_text": "rgba(204, 196, 180, 1)",
      "toolbar": "rgba(26, 29, 33, 1)",
      "bookmark_text": "rgba(240, 239, 235, 1)",
      "toolbar_field": "rgba(34, 38, 43, 1)",
      "toolbar_field_text": "rgba(204, 196, 180, 1)",
      "tab_line": "rgba(34, 38, 43, 1)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{23e4773d-08aa-4cb2-a4db-858fb5911a5b}"
    }
  }
}