Examine source code of jr

{
  "name": "jr",
  "manifest_version": 2,
  "version": "1.0",
  "theme": {
    "images": {
      "theme_frame": "image-2020-08-15-12-36-44.jpg"
    },
    "colors": {
      "frame": "rgba(219, 21, 21, 1)",
      "tab_background_text": "rgba(0, 0, 0, 1)",
      "toolbar": "rgba(34, 85, 0, 1)",
      "bookmark_text": "rgba(230, 215, 12, 1)",
      "toolbar_field": "rgba(17, 0, 85, 1)",
      "toolbar_field_text": "rgba(206, 12, 232, 1)"
    }
  }
}