Yes, you can either run the browser in a VM to supply the fake information the VM uses or, if that's still too real for you, you can download the source code of an open source browser, install its dependencies, remove the java script implementations of the functions that provide that information you want to block or change them to return fake fixed or randomised values, then compile the code yourself and use your custom compiled browser. If you remove those functions, be aware that this will break lots of JS in a way that it will fail unrecoverable. For example, if you remove functions to get the time zone, it will break JS date pickers so early, you won't be able to select a date on sites that require them to operate.