Examine source code of Game Hacking Dojo RED

{
  "manifest_version": 2,
  "version": "1.1",
  "name": "Game Hacking Dojo Red",
  "theme": {
    "images": {},
    "properties": {},
    "colors": {
      "toolbar": "rgb(28, 33, 37)",
      "toolbar_text": "rgb(204, 58, 69)",
      "frame": "rgb(28, 33, 37)",
      "tab_background_text": "rgb(174, 174, 174)",
      "toolbar_field": "rgb(28, 33, 37)",
      "toolbar_field_text": "rgb(204, 58, 69)",
      "tab_line": "rgb(204, 58, 69)",
      "popup": "rgb(28, 33, 37)",
      "popup_text": "rgb(204, 58, 69)",
      "icons_attention": "rgb(204, 58, 69)",
      "ntp_background": "rgb(28, 33, 37)",
      "ntp_text": "rgb(204, 58, 69)",
      "sidebar_text": "rgb(234, 234, 234)",
      "sidebar": "rgb(204, 58, 69)",
      "toolbar_field_highlight_text": "rgb(28, 33, 37)",
      "toolbar_field_highlight": "rgb(234, 234, 234)",
      "tab_loading": "rgb(204, 58, 69)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{30f07d2b-8440-4283-bc76-6529fc39c896}"
    }
  }
}