Examine source code of Goto2021 2

{
  "name": "Goto2021 2",
  "manifest_version": 2,
  "version": "2.0",
  "theme": {
    "images": {
      "theme_frame": "2019.png"
    },
    "colors": {
      "frame": "rgb(0, 2, 3)",
      "tab_background_text": "rgba(235, 241, 245, 1)",
      "toolbar": "rgba(55, 132, 179, 0)",
      "bookmark_text": "rgba(130, 217, 198, 0.59)",
      "toolbar_field": "rgba(59, 61, 191, 0.3)",
      "toolbar_field_text": "rgba(21, 204, 18, 0.59)",
      "tab_line": "rgba(237, 138, 38, 0.5)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{20971202-b9c0-4f40-b83c-28ec7f00fd5d}"
    }
  }
}