diff --git a/chrome/content/zotero/xpcom/attachments.js b/chrome/content/zotero/xpcom/attachments.js
index 61e34a3405..8cb616f68b 100644
--- a/chrome/content/zotero/xpcom/attachments.js
+++ b/chrome/content/zotero/xpcom/attachments.js
@@ -1137,9 +1137,9 @@ Zotero.Attachments = new function(){
 	 */
 	this.downloadPDFViaBrowser = async function (url, path, options = {}) {
 		Zotero.debug(`downloadPDFViaBrowser: Downloading file via browser from ${url}`);
-		const onLoadTimeout = 1e3;
+		const onLoadTimeout = Zotero.Prefs.get('downloadPDFViaBrowser.onLoadTimeout');
 		// Technically this is not a download, but the full operation timeout
-		const downloadTimeout = 60e3;
+		const downloadTimeout = Zotero.Prefs.get('downloadPDFViaBrowser.downloadTimeout');
 		let channelBrowser, hiddenBrowser;
 		let hiddenBrowserPDFFoundDeferred = Zotero.Promise.defer();
 		
diff --git a/defaults/preferences/zotero.js b/defaults/preferences/zotero.js
index 962b3a2566..25fd72e871 100644
--- a/defaults/preferences/zotero.js
+++ b/defaults/preferences/zotero.js
@@ -77,6 +77,9 @@ pref("extensions.zotero.sortCreatorAsString", false);
 pref("extensions.zotero.tagSelector.showAutomatic", true);
 pref("extensions.zotero.tagSelector.displayAllTags", false);
 
+pref("extensions.zotero.downloadPDFViaBrowser.onLoadTimeout", 1500);
+pref("extensions.zotero.downloadPDFViaBrowser.downloadTimeout", 60000);
+
 // Keyboard shortcuts
 pref("extensions.zotero.keys.saveToZotero", "S");
 pref("extensions.zotero.keys.newItem", "N");