diff --git a/.eslintrc b/.eslintrc
index 7b6dbf980..c6bef1304 100644
--- a/.eslintrc
+++ b/.eslintrc
@@ -88,6 +88,7 @@
     "no-unused-expressions": "error",
     "no-unused-labels": "error",
     "no-useless-call": "error",
+    "no-useless-catch": "error",
     "no-useless-concat": "error",
     "prefer-promise-reject-errors": "error",
     "wrap-iife": ["error", "any"],
diff --git a/web/app.js b/web/app.js
index 26da5e818..0d09e67ef 100644
--- a/web/app.js
+++ b/web/app.js
@@ -1621,17 +1621,13 @@ if (typeof PDFJSDev === 'undefined' || PDFJSDev.test('GENERIC')) {
       // cannot load file:-URLs in a Web Worker. file:-URLs are usually loaded
       // very quickly, so there is no need to set up progress event listeners.
       PDFViewerApplication.setTitleUsingUrl(file);
-      let xhr = new XMLHttpRequest();
+      const xhr = new XMLHttpRequest();
       xhr.onload = function() {
         PDFViewerApplication.open(new Uint8Array(xhr.response));
       };
-      try {
-        xhr.open('GET', file);
-        xhr.responseType = 'arraybuffer';
-        xhr.send();
-      } catch (ex) {
-        throw ex;
-      }
+      xhr.open('GET', file);
+      xhr.responseType = 'arraybuffer';
+      xhr.send();
       return;
     }