Examine source code of RRRVVV

{
  "manifest_version": 2,
  "version": "1.0",
  "name": "RRRVVV",
  "theme": {
    "images": {},
    "properties": {},
    "colors": {
      "toolbar": "rgb(52, 50, 50)",
      "toolbar_text": "rgb(255, 124, 123)",
      "frame": "rgb(120, 18, 18)",
      "tab_background_text": "rgb(255, 255, 255)",
      "toolbar_field": "rgb(255, 255, 255)",
      "toolbar_field_text": "rgb(230, 13, 11)",
      "tab_line": "rgb(226, 20, 20)",
      "popup": "rgb(120, 18, 18)",
      "popup_text": "rgb(255, 255, 255)",
      "button_background_active": "rgb(120, 18, 18)",
      "icons": "rgb(255, 31, 29)",
      "ntp_background": "rgb(40, 40, 40)",
      "ntp_text": "rgb(230, 13, 11)",
      "sidebar": "rgb(120, 18, 18)",
      "tab_loading": "rgb(226, 20, 20)",
      "tab_selected": "rgb(97, 2, 2)",
      "tab_text": "rgb(255, 255, 255)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{7c5ec545-e984-47f6-ac27-e737610aa002}"
    }
  }
}