It depends on what you are trying to disable. Ideally, you want to use either Windows Group Policy or a policies.json file to lock certain features.

If you lock something (for example, we will say that you use "BlockAboutAddons" to block the add-on manager page), the associated menu items will also be hidden.

Hope this helps.

Thank you Wesley for the reply, do you have a list of The personalize menu items so I can use them in the Json file, I do not know the names of the items to be added in the file.

A full list of all the policies that work on Firefox can be found here.