How to disable browser developer tools?

I'm developing a web application and since it has access to a database underneath, I require the ability to disable the developer tools from Safari, Chrome, Firefox and Internet Explorer and Firebug in Firefox and all similar applications. Is there a way to do this?

Note: The AJAX framework provided by the database requires that anything given to the database to be in web parameters that can be modified and that anything it returns be handled in JavaScript. Therefore when it returns a value like whether or not a user has access to a certain part of the website, it has to be handled in JavaScript, which developer tools can then access anyway. So this is required.

UPDATE: For those of you still thinking I'm making bad assumptions, I did ask the vendor. Below is their response:

Here are some suggestions for ways of mitigating the risk:

1) Use a javascript Obfuscator to obfuscate the code and only provide the obfuscated version with the sold application; keep the non obfuscated version for yourself to do edits. Here is an online obfuscator: How can I obfuscate (protect) JavaScript? http://en.wikipedia.org/wiki/Obfuscated_code http://javascriptobfuscator.com/default.aspx

2) Use a less descriptive name; maybe 'repeatedtasks.js' instead of 'security.js' as 'security.js' will probably stand out more to anyone looking through this type of information as something important.

Solution 1:

No you cannot do this.

The developer menu is on the client side and is provided by the user's browser.

Also the browser developer should have nothing to do with your server side database code, and if it does, you need some maaaaaajor restructuring.

Solution 2:

If your framework requires that you do authorization in the client, then...

You need to change your framework

When you put an application in the wild, where users that you don't trust can access it; you must draw a line in the sand.

• Physical hardware that you own; and can lock behind a strong door. You can do anything you like here; this is a great place to keep your database, and to perform the authorization functions to decide who can do what with your database.
• Everything else; Including browsers on client computers; mobile phones; Convenience Kiosks located in the lobby of your office. You cannot trust these! Ever! There's nothing you can do that means you can be totally sure that these machines aren't lying to cheat you and your customers out of money. You don't control it, so you can't ever hope to know what's going on.

Solution 3:

In fact this is somehow possible (how-does-facebook-disable-developer-tools), but this is terribly bad idea for protecting your data. Attacker may always use some other (open, self written) engines that you don't have any control on. Even javascript obfuscation may only slow down a bit cracking of your app, but it also gives practically no security.

The only reasonable way to protect your data is to write secure code on server side. And remember, that if you allow someone to download some data, he can do with it whatever he wants.