Necesito respuestas en español y que no me remitan a otros sitios web.

You can lock specific preferences if you do not want users to be able to change them.

See:

• http://kb.mozillazine.org/Locking_preferences

Please, answers my question in spanich. I can not use the link because my acces to www is close. Thans

I don't speak and write Spanish.

You can use Google Translate to translate English (or almost any language) in Spanish.
I also used that to understand your question.

• http://translate.google.com/translate?hl=es&sl=auto&tl=es&u=

You can also paste an URL in that window:
También puede pegar una URL en la ventana

It is possible to hide menu entries with code in userChrome.css or with the Menu Editor extension, but such solutions can be bypassed by experienced users.

• Menu Editor: https://addons.mozilla.org/firefox/addon/menu-editor/
• http://kb.mozillazine.org/Editing_configuration

I read and write in english very poor. Also, icant not visited www.google.com. Thans you for your help. I live in Cuba.

Which items in particular do you want to protect in the Options menu or do you want to prevent them from entering the options menu at all?

• https://support.mozilla.com/es/kb/Options+window

• Public Fox: https://addons.mozilla.org/firefox/addon/public-fox/

Yes, want to prevent them from entering the options menu at all