HI

I am serializing to a JSON object using

 JavaScriptSerializer js = new JavaScriptSerializer();
 HttpContext.Current.Response.ContentType = "application/json";
 HttpContext.Current.Response.Write(js.Serialize(response));

response is of Class

public class Response
    {
        public bool success;
        public int id;
        public string error;
      
    }

 and in my JavaScript file I am deserializing

using

var sResponse = Sys.Serialization.JavaScriptSerializer.deserialize(response); 

For IE and Safari  response is properly deserialized.

But for firefox it says The data doesnt correspond to a valid JSON.

 What is your json string? 

I have a feeling that since your not clearing your response, that maybe some other text is coming back with the json which is screwing it up

 this is my string {"success":true,"id":5733012,"error":""}

I tested in FF 3.0.1 and it works but doesnt work on FF 2.0.0.16 . Is this a known FF bug ?

 are you running the latest version of ASP.Net Ajax?

  version - 1.0.61025.0