zotero-better-notes/addon/chrome/content/styles/templatePicker.css

dialog {
  -moz-window-dragging: drag;
  max-height: 700px;
}

.viewport-container {
  -moz-window-dragging: no-drag;
}

.viewport {
  width: 100%;
}

#table-container {
  width: 100%;
  height: 100%;
  overflow: auto;
  background: var(--material-background);
}