diff --git a/chrome/content/zotero/reader.xhtml b/chrome/content/zotero/reader.xhtml
index 948a9aeff7..47da34968f 100644
--- a/chrome/content/zotero/reader.xhtml
+++ b/chrome/content/zotero/reader.xhtml
@@ -348,6 +348,7 @@
 					 primary="true"
 					 transparent="transparent"
 					 src="resource://zotero/reader/reader.html"
+					 context="textbox-contextmenu"
 					 flex="1"/>
 			<popupset id="zotero-reader-popupset">
 			</popupset>
diff --git a/chrome/content/zotero/xpcom/reader.js b/chrome/content/zotero/xpcom/reader.js
index f67e07e755..8ddddc8ced 100644
--- a/chrome/content/zotero/xpcom/reader.js
+++ b/chrome/content/zotero/xpcom/reader.js
@@ -1098,6 +1098,7 @@ class ReaderTab extends ReaderInstance {
 		this._iframe.setAttribute('type', 'content');
 		this._iframe.setAttribute('transparent', 'true');
 		this._iframe.setAttribute('src', 'resource://zotero/reader/reader.html');
+		this._iframe.setAttribute('context', 'textbox-contextmenu');
 		this._tabContainer.appendChild(this._iframe);
 		this._iframe.docShell.windowDraggingAllowed = true;
 		
@@ -1108,6 +1109,8 @@ class ReaderTab extends ReaderInstance {
 		this._window.addEventListener('pointerdown', this._handlePointerDown);
 		this._window.addEventListener('pointerup', this._handlePointerUp);
 
+		this._window.goBuildEditContextMenu();
+
 		this._iframe.setAttribute('tooltip', 'html-tooltip');
 
 		this._open({ location: options.location, secondViewState: options.secondViewState });
@@ -1127,6 +1130,19 @@ class ReaderTab extends ReaderInstance {
 			this._window.removeEventListener('DOMContentLoaded', this._handleLoad);
 			this._iframeWindow = this._iframe.contentWindow;
 			this._iframeWindow.addEventListener('error', event => Zotero.logError(event.error));
+
+			// Disable text direction switching option because it tries to change direction
+			// for the whole window and crashes it
+			this._iframeWindow.addEventListener('contextmenu', () => {
+				let popup = this._window.goBuildEditContextMenu();
+				this._window.goUpdateGlobalEditMenuItems(true);
+				popup.addEventListener('popupshowing', (e) => {
+					let menuitemSwitchTextDirection = e.target.querySelector("[command='cmd_switchTextDirection']");
+					if (menuitemSwitchTextDirection) {
+						menuitemSwitchTextDirection.hidden = true;
+					}
+				}, { once: true });
+			});
 		}
 	};
 
@@ -1226,6 +1242,18 @@ class ReaderWindow extends ReaderInstance {
 			if (this._iframe.contentWindow && this._iframe.contentWindow.document === event.target) {
 				this._iframeWindow = this._window.document.getElementById('reader').contentWindow;
 				this._iframeWindow.addEventListener('error', event => Zotero.logError(event.error));
+				this._window.goBuildEditContextMenu();
+				// Disable text direction switching option because it changes direction for the whole window
+				this._iframeWindow.addEventListener('contextmenu', () => {
+					let popup = this._window.goBuildEditContextMenu();
+					this._window.goUpdateGlobalEditMenuItems(true);
+					popup.addEventListener('popupshowing', (e) => {
+						let menuitemSwitchTextDirection = e.target.querySelector("[command='cmd_switchTextDirection']");
+						if (menuitemSwitchTextDirection) {
+							menuitemSwitchTextDirection.hidden = true;
+						}
+					}, { once: true });
+				});
 			}
 
 			this._switchReaderSubtype(this._type);