I would like to know how to hide the add-on tab or plugin tab via about:config.

For security consideration, I would like to make a custom profile to deploy to all the clients in my company. I want to change "about:config" and write into the file prefs.js, but I don't know which item of "about: config" can hide the add-on or plugin tabs. Could you tell me how to do this via about:config changing, thanks a lot.