Examine source code of Soft Orange/Red

{
  "name": "Circuit-board",
  "manifest_version": 2,
  "version": "1.0",
  "theme": {
    "images": {
      "theme_frame": "header_firefox.svg"
    },
    "colors": {
      "frame": "rgba(50, 50, 50, 1)",
      "tab_background_text": "rgba(247, 126, 33, 1)",
      "toolbar": "rgba(70, 70, 70, 1)",
      "bookmark_text": "rgba(247, 126, 33, 1)",
      "toolbar_field": "rgba(50, 50, 50, 1)",
      "toolbar_field_text": "rgba(247, 126, 33, 1)",
      "tab_line": "rgba(242, 41, 91, 1)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{09e98f2b-4842-4bbd-ab4e-96d9ac354dbe}"
    }
  }
}