Examine source code of Monochrome Arma

{
  "manifest_version": 2,
  "version": "1.0",
  "name": "arma's theme",
  "theme": {
    "images": {},
    "properties": {},
    "colors": {
      "toolbar": "rgb(100, 100, 100)",
      "toolbar_text": "rgb(255, 255, 255)",
      "frame": "rgb(50, 50, 50)",
      "tab_background_text": "rgb(255, 255, 255)",
      "toolbar_field": "rgb(255, 255, 255)",
      "toolbar_field_text": "rgb(0, 0, 0)",
      "tab_line": "rgb(255, 255, 255)",
      "popup": "rgb(50, 50, 50)",
      "popup_text": "rgb(255, 255, 255)",
      "button_background_hover": "rgb(50, 50, 50)",
      "icons": "rgb(255, 255, 255)",
      "ntp_background": "rgb(70, 70, 70)",
      "tab_selected": "rgb(255, 255, 255)",
      "tab_text": "rgb(0, 0, 0)",
      "toolbar_field_border_focus": "rgba(255, 255, 255, 0)",
      "tab_loading": "rgb(255, 255, 255)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{2ded88c6-ca6c-4e15-906a-46e9523b4688}"
    }
  }
}