Examine source code of Lilas Plus Dark

{
  "name": "Lilas Plus Dark",
  "manifest_version": 2,
  "version": "2.0",
  "theme": {
    "images": {
      "theme_frame": "BGfirefox.png"
    },
    "colors": {
      "frame": "rgb(51, 51, 51)",
      "tab_background_text": "rgb(169, 112, 255)",
      "toolbar": "rgb(7, 0, 59)",
      "bookmark_text": "rgb(122, 0, 255)",
      "toolbar_field": "rgb(71, 94, 154)",
      "toolbar_field_text": "rgb(21, 0, 75)",
      "tab_line": "rgb(121, 0, 255)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{e3255c25-b378-4913-bb08-ebd3889112ce}"
    }
  }
}