message: Fixed pdf sniffer initiation storage check
diff: @@ -11,7 +11,7 @@ storage.sync.get('config', ({config}) => {
  })
  storage.sync.listen('config', ({config: {newValue, oldValue}}) => {
  - if (newValue.pdfSniff !== oldValue.pdfSniff) {
  + if (!oldValue || newValue.pdfSniff !== oldValue.pdfSniff) {
  if (newValue.pdfSniff) {
  startListening()
  } else {
  