diff --git a/chrome/content/zotero/tabs.js b/chrome/content/zotero/tabs.js
index 727aba2913..8aa3a4ccd1 100644
--- a/chrome/content/zotero/tabs.js
+++ b/chrome/content/zotero/tabs.js
@@ -80,13 +80,7 @@ var Zotero_Tabs = new function () {
 			iconBackgroundImage: tab.iconBackgroundImage
 		})));
 		var { tab } = this._getTab(this._selectedID);
-		let tabTitle = tab.title;
-		if (Zotero.isWin) {
-			// Windows displays bidi control characters as placeholders in window titles, so strip them
-			// See https://github.com/mozilla-services/screenshots/issues/4863
-			tabTitle = tabTitle.replace(/[\u2068\u2069]/g, '');
-		}
-		document.title = (tabTitle.length ? tabTitle + ' - ' : '') + 'Zotero';
+		document.title = (tab.title.length ? tab.title + ' - ' : '') + 'Zotero';
 		this._updateTabBar();
 		// Hide any tab `title` tooltips that might be open
 		window.Zotero_Tooltip.stop();
diff --git a/chrome/content/zotero/xpcom/reader.js b/chrome/content/zotero/xpcom/reader.js
index 5c6d67f228..b87fbd926d 100644
--- a/chrome/content/zotero/xpcom/reader.js
+++ b/chrome/content/zotero/xpcom/reader.js
@@ -198,6 +198,11 @@ class ReaderInstance {
 				readerTitle = parts.filter(x => x).join(' - ');
 			}
 		}
+		if (Zotero.isWin) {
+			// Windows displays bidi control characters as placeholders in window titles, so strip them
+			// See https://github.com/mozilla-services/screenshots/issues/4863
+			readerTitle = readerTitle.replace(/[\u2068\u2069]/g, '');
+		}
 		this._title = readerTitle;
 		this._setTitleValue(readerTitle);
 	}