Examine source code of devuanpup

{
  "name": "devuanpup",
  "manifest_version": 2,
  "version": "3.0",
  "theme": {
    "images": {
      "theme_frame": "6.png"
    },
    "colors": {
      "frame": "rgb(50, 50, 50)",
      "tab_background_text": "rgb(255, 255, 255)",
      "toolbar": "rgb(50, 50, 50)",
      "bookmark_text": "rgb(255, 255, 255)",
      "toolbar_field": "rgb(71, 128, 116)",
      "toolbar_field_text": "rgb(255, 255, 255)",
      "tab_line": "rgb(71, 128, 116)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{dd36d3a8-0669-4e19-8f77-1fab578c8629}"
    }
  }
}