MinUI is a Firefox add-on, can hide or unhide toolbars in Firefox easily, enable you to select the toolbars to be shown in Firefox more easily. Tap "Ctrl" to hide various elements of the user interface, tap again to unhide.
You can also configure what you want to hide in Tools > MinUI. It is very lightweight and doesnr require a restart.

Requirements:
* Firefox

The license of this software is Free, you can free download and free use this browser plug-ins software.