diff --git a/browser/components/extensions/test/browser/browser_ext_getViews.js b/browser/components/extensions/test/browser/browser_ext_getViews.js
index 61cc6facd04a..3e6ae598869c 100644
--- a/browser/components/extensions/test/browser/browser_ext_getViews.js
+++ b/browser/components/extensions/test/browser/browser_ext_getViews.js
@@ -131,6 +131,7 @@ add_task(async function() {
   }
 
   await checkViews("background", 0, 0, 0);
+  await checkViewsWithFilter({windowId: -1}, 1);
   await checkViewsWithFilter({tabId: -1}, 1);
 
   let tabId1 = await openTab(winId1);
diff --git a/toolkit/components/extensions/ExtensionPageChild.jsm b/toolkit/components/extensions/ExtensionPageChild.jsm
index aeb1bf8ffc1a..3d1893066f71 100644
--- a/toolkit/components/extensions/ExtensionPageChild.jsm
+++ b/toolkit/components/extensions/ExtensionPageChild.jsm
@@ -153,6 +153,7 @@ class ExtensionBaseContextChild extends BaseContext {
       let globalView = ExtensionPageChild.contentGlobals.get(this.messageManager);
       return globalView ? globalView.windowId : -1;
     }
+    return -1;
   }
 
   get tabId() {