palemoon-dev/platform/layout/style/res/noscript.css

/* This Source Code Form is subject to the terms of the Mozilla Public
 * License, v. 2.0. If a copy of the MPL was not distributed with this
 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */

/* This sheet is added to the style set for documents with script disabled */

noscript {
  display: none !important;
}