message: refactor(options): not auto-calibrating titlebar height on ff
diff: @@ -194,7 +194,8 @@ async function onInstalled({
  loadDictPanelToAllTabs()
  - if (!(await getTitlebarOffset())) {
  + // firefox users may want to calibrate manually
  + if (!isFirefox && !(await getTitlebarOffset())) {
  const offset = await calibrateTitlebarOffset()
  if (offset) {
  setTitlebarOffset(offset)
  