Better Webbrowser Control with More Control Over Urls and Information?

I have an issue bugging me for the past few weeks. What I'm trying to accomplish: I need a webbrowser control with the ability to change user agent (once at start) and referrer. But most important The ability to see the urls responses. What I mean by that for example if you navigate to a website you get back Images/Javascripts/Tracking scripts executed files/urls for example: go to [login to view URL] some queries will be executed in the background you don't see those get's only can see them with a tool like fiddler. I need access to those urls the exact get queries that are executed to scrape information from the url(Regular Webbrowser Control will not show you those & you can't access it in any way). I was able to do that with webbrowser + fiddlercore I can see and do what ever with those urls addresses. The problem was if you run few instances of this program (or sometimes once if the program has some automation to work with the url responses) It gets stuck or doesn't work. I tried fixing it and making it work but it's kind of a hacky solution that doesn't work right. I need a simple way to access those urls just as if you used httpwebrequest but as a webbrowser. Why I need it as a webbrowser? The way I work I need the execution of all the tracking pixels and scripts and images etc.. a normal webbrowser behaivor in httpwebrequest if you want google analytics you have to create a code to re create it, you can't just navigate and all the scripts will be execute as webbrowser, or can you? can you guys can offer me some help or guide me or if you know how to do it lets build what I need? Thanks!