Examine source code of DMS-2019

{
  "name": "DMS-2019",
  "manifest_version": 2,
  "version": "1.0",
  "theme": {
    "images": {
      "theme_frame": "firefox-top-2019.png"
    },
    "colors": {
      "frame": "rgba(252, 126, 0, 1)",
      "tab_background_text": "rgba(0, 0, 0, 1)",
      "toolbar": "rgba(138, 104, 23, 1)",
      "toolbar_field": "rgba(91, 217, 93, 1)"
    }
  }
}