Update

ftplugin/nftables.vim

@@ -0,0 +1,28 @@
+if polyglot#init#is_disabled(expand('<sfile>:p'), 'nftables', 'ftplugin/nftables.vim')
+  finish
+endif
+
+if exists('b:did_ftplugin')
+    finish
+endif
+let b:did_ftplugin = 1
+
+let s:save_cpo = &cpoptions
+set cpoptions&vim
+
+setlocal smartindent nocindent
+setlocal commentstring=#%s
+setlocal formatoptions-=t formatoptions+=croqnlj
+
+setlocal comments=b:#
+
+setlocal tabstop=4 shiftwidth=4 softtabstop=4 expandtab
+setlocal textwidth=99
+
+let b:undo_ftplugin = '
+    \ setlocal formatoptions< comments< commentstring<
+    \|setlocal tabstop< shiftwidth< softtabstop< expandtab< textwidth<
+    \'
+
+let &cpoptions = s:save_cpo
+unlet s:save_cpo