Examine source code of NordTheme10

{
  "name": "NordTheme10",
  "manifest_version": 2,
  "version": "3.0",
  "theme": {
    "images": {
      "theme_frame": "stupidheaderforfirefox.png"
    },
    "colors": {
      "frame": "rgba(46, 52, 64, 1)",
      "tab_background_text": "rgba(189, 193, 199, 1)",
      "toolbar": "rgba(51, 58, 72, 1)",
      "bookmark_text": "rgba(189, 193, 199, 1)",
      "toolbar_field": "rgba(46, 52, 64, 1)",
      "toolbar_field_text": "rgba(189, 193, 199, 1)"
    }
  }
}