message: refactor(settings): pdf sniff off by default
diff: @@ -80,7 +80,7 @@ function _getDefaultConfig() {
  fontSize: 13,
  /** sniff pdf request */
  - pdfSniff: true,
  + pdfSniff: false,
  /** URLs, [regexp.source, match_pattern] */
  pdfWhitelist: [] as [string, string][],
  /** URLs, [regexp.source, match_pattern] */
  