I would request some more info on your use-case, but i have two guesses so far :
1) You have a web site or service and want to deliver transactions securely, server side, without debugger access to the relevant logic.
or
2) You want a generic browser for some type of users that should not be able to access html or javascript source on any site.
Neither one of these is that difficult, but would need a brief discourse to see what your application needs are - then can deliver this in in a short amount of time in c#, client side or asp.net server side depending on what is needed.
Thanks.