diff --git a/apps/browser/src/autofill/services/collect-autofill-content.service.ts b/apps/browser/src/autofill/services/collect-autofill-content.service.ts
index 2cdcbd67023f..efacafbe88ef 100644
--- a/apps/browser/src/autofill/services/collect-autofill-content.service.ts
+++ b/apps/browser/src/autofill/services/collect-autofill-content.service.ts
@@ -644,6 +644,10 @@ export class CollectAutofillContentService implements CollectAutofillContentServ
     }
 
     const tableDataElementIndex = tableDataElement.cellIndex;
+    if (tableDataElementIndex < 0) {
+      return null;
+    }
+
     const parentSiblingTableRowElement = tableDataElement.closest("tr")
       ?.previousElementSibling as HTMLTableRowElement;