diff --git a/mozilla/docshell/base/nsDSURIContentListener.cpp b/mozilla/docshell/base/nsDSURIContentListener.cpp
index 4057ecc73e3..557d8d85ab2 100644
--- a/mozilla/docshell/base/nsDSURIContentListener.cpp
+++ b/mozilla/docshell/base/nsDSURIContentListener.cpp
@@ -159,7 +159,7 @@ nsDSURIContentListener::IsPreferred(const char* aContentType,
     NS_ENSURE_ARG_POINTER(aDesiredContentType);
 
     // the docshell has no idea if it is the preferred content provider or not.
-    // It needs to ask it's parent if it is the preferred content handler or not...
+    // It needs to ask its parent if it is the preferred content handler or not...
 
     nsCOMPtr<nsIURIContentListener> parentListener;
     GetParentContentListener(getter_AddRefs(parentListener));
diff --git a/mozilla/docshell/base/nsDocShell.cpp b/mozilla/docshell/base/nsDocShell.cpp
index 807b5578e43..73b5fe3b2ae 100644
--- a/mozilla/docshell/base/nsDocShell.cpp
+++ b/mozilla/docshell/base/nsDocShell.cpp
@@ -6516,7 +6516,7 @@ nsDocShell::CheckLoadingPermissions()
     NS_ENSURE_TRUE(NS_SUCCEEDED(rv) && subjPrincipal, rv);
 
     // Check if the caller is from the same origin as this docshell,
-    // or any of it's ancestors.
+    // or any of its ancestors.
     nsCOMPtr<nsIDocShellTreeItem> item(this);
     do {
         nsCOMPtr<nsIScriptGlobalObject> sgo(do_GetInterface(item));