add firefox config in declarative, andd ntfs3g to mount ntfs drives

modules/firefox.nix

@@ -0,0 +1,11 @@
+{ config, lib, pkgs, inputs, username, homeDir, ... }:
+
+{
+  programs.firefox = {
+    enable = true;
+    profiles.default = {
+      extensions = with inputs.firefox-addons.packages."x86_64-linux"; 
+	  [vimium ublock-origin];
+	};
+  };
+}