diff --git a/gulpfile.mjs b/gulpfile.mjs
index d76fca84a..58e78c7d7 100644
--- a/gulpfile.mjs
+++ b/gulpfile.mjs
@@ -270,6 +270,7 @@ function createWebpackConfig(
     "web-alt_text_manager": "web/alt_text_manager.js",
     "web-annotation_editor_params": "web/annotation_editor_params.js",
     "web-com": "",
+    "web-download_manager": "",
     "web-l10n_utils": "web/stubs.js",
     "web-pdf_attachment_viewer": "web/pdf_attachment_viewer.js",
     "web-pdf_cursor_tools": "web/pdf_cursor_tools.js",
@@ -289,6 +290,7 @@ function createWebpackConfig(
     libraryAlias["display-network"] = "src/display/network.js";
 
     viewerAlias["web-com"] = "web/chromecom.js";
+    viewerAlias["web-download_manager"] = "web/download_manager.js";
     viewerAlias["web-print_service"] = "web/pdf_print_service.js";
   } else if (bundleDefines.GENERIC) {
     // Aliases defined here must also be replicated in the paths section of
@@ -300,6 +302,7 @@ function createWebpackConfig(
     libraryAlias["display-node_utils"] = "src/display/node_utils.js";
 
     viewerAlias["web-com"] = "web/genericcom.js";
+    viewerAlias["web-download_manager"] = "web/download_manager.js";
     viewerAlias["web-l10n_utils"] = "web/l10n_utils.js";
     viewerAlias["web-print_service"] = "web/pdf_print_service.js";
   } else if (bundleDefines.MOZCENTRAL) {
@@ -313,6 +316,7 @@ function createWebpackConfig(
       }
     }
     viewerAlias["web-com"] = "web/firefoxcom.js";
+    viewerAlias["web-download_manager"] = "web/firefoxcom.js";
     viewerAlias["web-print_service"] = "web/firefox_print_service.js";
   }
   const alias = { ...basicAlias, ...libraryAlias, ...viewerAlias };
diff --git a/test/unit/unit_test.html b/test/unit/unit_test.html
index 3bfa5a66a..804f3eaf8 100644
--- a/test/unit/unit_test.html
+++ b/test/unit/unit_test.html
@@ -28,6 +28,7 @@
         "web-alt_text_manager": "../../web/alt_text_manager.js",
         "web-annotation_editor_params": "../../web/annotation_editor_params.js",
         "web-com": "../../web/genericcom.js",
+        "web-download_manager": "../../web/download_manager.js",
         "web-l10n_utils": "../../web/l10n_utils.js",
         "web-pdf_attachment_viewer": "../../web/pdf_attachment_viewer.js",
         "web-pdf_cursor_tools": "../../web/pdf_cursor_tools.js",
diff --git a/web/app.js b/web/app.js
index e5e506f92..0e258d2f3 100644
--- a/web/app.js
+++ b/web/app.js
@@ -56,6 +56,7 @@ import { AutomationEventBus, EventBus } from "./event_utils.js";
 import { LinkTarget, PDFLinkService } from "./pdf_link_service.js";
 import { AltTextManager } from "web-alt_text_manager";
 import { AnnotationEditorParams } from "web-annotation_editor_params";
+import { DownloadManager } from "web-download_manager";
 import { OverlayManager } from "./overlay_manager.js";
 import { PasswordPrompt } from "./password_prompt.js";
 import { PDFAttachmentViewer } from "web-pdf_attachment_viewer";
@@ -98,10 +99,6 @@ class DefaultExternalServices {
 
   static reportTelemetry(data) {}
 
-  static createDownloadManager() {
-    throw new Error("Not implemented: createDownloadManager");
-  }
-
   static createPreferences() {
     throw new Error("Not implemented: createPreferences");
   }
@@ -390,8 +387,7 @@ const PDFViewerApplication = {
     });
     this.pdfLinkService = pdfLinkService;
 
-    const downloadManager = externalServices.createDownloadManager();
-    this.downloadManager = downloadManager;
+    const downloadManager = (this.downloadManager = new DownloadManager());
 
     const findController = new PDFFindController({
       linkService: pdfLinkService,
diff --git a/web/chromecom.js b/web/chromecom.js
index a16ff3b28..97df08e12 100644
--- a/web/chromecom.js
+++ b/web/chromecom.js
@@ -17,7 +17,6 @@
 import { DefaultExternalServices, PDFViewerApplication } from "./app.js";
 import { AppOptions } from "./app_options.js";
 import { BasePreferences } from "./preferences.js";
-import { DownloadManager } from "./download_manager.js";
 import { GenericL10n } from "./genericl10n.js";
 import { GenericScripting } from "./generic_scripting.js";
 
@@ -427,10 +426,6 @@ class ChromeExternalServices extends DefaultExternalServices {
     );
   }
 
-  static createDownloadManager() {
-    return new DownloadManager();
-  }
-
   static createPreferences() {
     return new ChromePreferences();
   }
diff --git a/web/firefoxcom.js b/web/firefoxcom.js
index 07d9f73e0..7fb802e19 100644
--- a/web/firefoxcom.js
+++ b/web/firefoxcom.js
@@ -382,10 +382,6 @@ class FirefoxExternalServices extends DefaultExternalServices {
     FirefoxCom.request("reportTelemetry", JSON.stringify(data));
   }
 
-  static createDownloadManager() {
-    return new DownloadManager();
-  }
-
   static createPreferences() {
     return new FirefoxPreferences();
   }
diff --git a/web/genericcom.js b/web/genericcom.js
index 60205c46c..65bc4e63d 100644
--- a/web/genericcom.js
+++ b/web/genericcom.js
@@ -16,7 +16,6 @@
 import { DefaultExternalServices, PDFViewerApplication } from "./app.js";
 import { AppOptions } from "./app_options.js";
 import { BasePreferences } from "./preferences.js";
-import { DownloadManager } from "./download_manager.js";
 import { GenericL10n } from "./genericl10n.js";
 import { GenericScripting } from "./generic_scripting.js";
 
@@ -39,10 +38,6 @@ class GenericPreferences extends BasePreferences {
 }
 
 class GenericExternalServices extends DefaultExternalServices {
-  static createDownloadManager() {
-    return new DownloadManager();
-  }
-
   static createPreferences() {
     return new GenericPreferences();
   }
diff --git a/web/viewer-geckoview.html b/web/viewer-geckoview.html
index c7309f46d..3e58d1673 100644
--- a/web/viewer-geckoview.html
+++ b/web/viewer-geckoview.html
@@ -61,6 +61,7 @@ See https://github.com/adobe-type-tools/cmap-resources
           "web-alt_text_manager": "./stubs-geckoview.js",
           "web-annotation_editor_params": "./stubs-geckoview.js",
           "web-com": "./genericcom.js",
+          "web-download_manager": "./download_manager.js",
           "web-l10n_utils": "./l10n_utils.js",
           "web-pdf_attachment_viewer": "./stubs-geckoview.js",
           "web-pdf_cursor_tools": "./stubs-geckoview.js",
diff --git a/web/viewer.html b/web/viewer.html
index 1b6451c91..84e8f1432 100644
--- a/web/viewer.html
+++ b/web/viewer.html
@@ -70,6 +70,7 @@ See https://github.com/adobe-type-tools/cmap-resources
           "web-alt_text_manager": "./alt_text_manager.js",
           "web-annotation_editor_params": "./annotation_editor_params.js",
           "web-com": "./genericcom.js",
+          "web-download_manager": "./download_manager.js",
           "web-l10n_utils": "./l10n_utils.js",
           "web-pdf_attachment_viewer": "./pdf_attachment_viewer.js",
           "web-pdf_cursor_tools": "./pdf_cursor_tools.js",