If searched the https://help.zoho.com/portal/community site and it seems that you can only hide some fields if you have the enterprise edition.

I'm not looking for a Security solution, I only want cleaner interface so I think the only way is to develop a chrome extension.

I've already stared to develop it in https://github.com/fmmribeiro/scZohoHideElements

But using a "Content Script" the extension is fired before the page is fully loaded (zoho uses some kind of async content loading)

HOW do I execute my Content Script after the page is fully loaded?

Ps: By now the only way to bypass this problem is to click the chrome extension button (background script)