diff --git a/addon/chrome/content/workspaceWindow.xhtml b/addon/chrome/content/workspaceWindow.xhtml
index a94edc1..31c6829 100644
--- a/addon/chrome/content/workspaceWindow.xhtml
+++ b/addon/chrome/content/workspaceWindow.xhtml
@@ -50,7 +50,7 @@
     </style>
     <link rel="localization" href="__addonRef__-workspaceWindow.ftl" />
   </head>
-  <body class="zotero-window">
+  <body class="zotero-window workspace-window">
     <xul:commandset id="mainCommandSet">
       <xul:command id="cmd_close" oncommand="window.close();" />
     </xul:commandset>
diff --git a/src/hooks.ts b/src/hooks.ts
index 6c952c1..1175f44 100644
--- a/src/hooks.ts
+++ b/src/hooks.ts
@@ -186,7 +186,7 @@ function onOpenNote(
           | HTMLElement
           | undefined
       )?.dataset.uid;
-    } else if (currentWindow?.document.querySelector("bn-workspace")) {
+    } else if (currentWindow?.document.querySelector("body.workspace-window")) {
       mode = "preview";
       workspaceUID = (
         currentWindow.document.querySelector("bn-workspace") as
