diff --git a/doc/bookmarkfs.texi b/doc/bookmarkfs.texi
index e13627e..404fa3a 100644
--- a/doc/bookmarkfs.texi
+++ b/doc/bookmarkfs.texi
@@ -2808,6 +2808,13 @@ depending on the value of @code{flags}.
 A bit array of the following flags:
 
 @table @code
+@item BOOKMARKFS_BOOKMARK_DELETE_DIR
+Indicates that the object to be removed is a directory.
+
+If the current backend context is not in exclusive mode
+(@pxref{Exclusive Mode}), this information may be incorrect.
+If so, the function should fail with @code{ENOTDIR} or @code{EISDIR}.
+
 @item BOOKMARKFS_BOOKMARK_TYPE_MASK
 The subsystem to operate on.
 
diff --git a/src/backend_chromium.c b/src/backend_chromium.c
index 89f48b3..f19ed1e 100644
--- a/src/backend_chromium.c
+++ b/src/backend_chromium.c
@@ -2194,7 +2194,7 @@ bookmark_delete (
     void       *backend_ctx,
     uint64_t    parent_id,
     char const *name,
-    uint32_t    UNUSED_VAR(flags)
+    uint32_t    flags
 ) {
     struct backend_ctx *ctx = backend_ctx;
     debug_assert(!(ctx->flags & BOOKMARKFS_BACKEND_READONLY));
@@ -2223,15 +2223,19 @@ bookmark_delete (
     if (0 != lookup_name(ctx, parent_id, name, strlen(name), &lctx, &entry)) {
         return -ENOENT;
     };
-    json_t *siblings   = parent_entry->children;
-    json_t const *node = entry->node;
 
     // Check if entry can be deleted
-    json_t const *children = json_object_sget(node, "children");
-    if (children != NULL) {
-        if (0 != json_array_size(children)) {
+    if (flags & BOOKMARK_FLAG(DELETE_DIR)) {
+        if (unlikely(entry->children == NULL)) {
+            return -ENOTDIR;
+        }
+        if (0 != json_array_size(entry->children)) {
             return -ENOTEMPTY;
         }
+    } else {
+        if (unlikely(entry->children != NULL)) {
+            return -EISDIR;
+        }
     }
 
     // Remove from maps
@@ -2245,7 +2249,8 @@ bookmark_delete (
     free(entry);
 
     // Remove from store
-    json_array_remove(siblings, json_array_search(siblings, node));
+    json_t *siblings = parent_entry->children;
+    json_array_remove(siblings, json_array_search(siblings, entry->node));
 
     ctx->dirty = DIRTY_LEVEL_DATA;
 
diff --git a/src/backend_firefox.c b/src/backend_firefox.c
index 4b735c3..5ac523c 100644
--- a/src/backend_firefox.c
+++ b/src/backend_firefox.c
@@ -454,7 +454,7 @@ bookmark_do_delete (
         return status;
     }
     if (unlikely((cols.place_id == 0) != is_dir)) {
-        return is_dir ? -ENOTDIR : -EPERM;
+        return is_dir ? -ENOTDIR : -EISDIR;
     }
 
     status = mozbm_delete(ctx, cols.id, is_dir);