Examine source code of Red Darkness 1

{
  "name": "Red Darkness",
  "manifest_version": 2,
  "version": "1.0",
  "theme": {
    "images": {
      "theme_frame": "lightgreyyyyyaaasaaaa.jpg"
    },
    "colors": {
      "frame": "rgba(77, 77, 77, 1)",
      "tab_background_text": "rgba(71, 71, 71, 1)",
      "toolbar": "rgba(36, 36, 36, 1)",
      "bookmark_text": "rgba(179, 0, 0, 1)",
      "toolbar_field": "rgba(143, 143, 143, 1)",
      "toolbar_field_text": "rgba(61, 61, 61, 1)",
      "tab_line": "rgba(107, 0, 0, 1)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{c10519a8-5a08-47b0-b9fd-dc8f0ca687fa}"
    }
  }
}