On https://github.com/mozilla/pdf.js/wiki/Required-Browser-Features we mention required browser features for PDF.js, but I have the feeling that not all of them are necessary nowadays since we moved to using more modern features over the years. Moreover, as indicated in https://github.com/mozilla/pdf.js/issues/11950#issuecomment-637149085, some features may be missing such as range requests or `async/await`.

In short, we should verify which are still necessary and update the wiki page and the automated feature detection if possible.
createStringSource(CONFIG_FILE, JSON.stringify(config, null, 2)).pipe(
        gulp.dest(".")
      ),
      compressPublish("pdfjs-" + version + "-dist.zip", GENERIC_DIR),
      compressPublish(
        "pdfjs-" + version + "-legacy-dist.zip",
        GENERIC_LEGACY_DIR
      ),
    ]);
  })
);
gulp.task("testing-pre", function (done) {
  process.env.TESTING = "true";
  
  
  
  process.env.TZ = "UTC";
  done();
});
gulp.task(
  "test",
  gulp.series("testing-pre", "generic", "components", function () {
    return streamqueue(
      { objectMode: true },
      createTestSource("unit"),
      createTestSource("browser"),
      createTestSource("integration")
    );
  })
);