palemoon-dev/platform/devtools/client/themes/devtools-browser.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/. */

@import url("resource://devtools/client/themes/splitters.css");

/* Bottom-docked toolbox minimize transition */
.devtools-toolbox-bottom-iframe {
  transition: margin-bottom .1s;
}

.devtools-toolbox-side-iframe {
  min-width: 465px;
}

/* Eyedropper Widget */
/* <panel> added to mainPopupSet */

.devtools-eyedropper-panel {
  pointer-events: none;
  -moz-appearance: none;
  width: 156px;
  height: 120px;
  background-color: transparent;
  border: none;
}