SqlDependency update is not working in Chrome or Firefox in ASP.Net

SqlDependency update works accurately in Microsoft edge but doesn't work properly in chrome or Firefox. What could be the cause for this kind of discrepancies?

Is there something I have to set up for different browsers to make SqlDependency update work the same way?

//I use webmethod called ProcessValue to communicate with ajax call in codebehind TestFolder/Test.aspx
[WebMethod] 
publicstaticvoid ProcessValue(string value) 
{ 
     NotificationComponent.ProcessData(value.ToString()); 
}  
 
//Then I have another class to handle the sqldependency onchange event as below
 
privatestaticstring result;  
 
 [WebMethod] 
 publicstaticvoid ProcessData(string value) 
 { 
     result = Convert.ToString(value); 
 }
 
publicstaticstring GetResult() 
{ 
     return result; 
}  
 
publicvoid RegisterNotification(DateTime currentTime) 
{ 
      string conStr = ConfigurationManager.ConnectionStrings["ChatConnection"].ConnectionString;
 
      string sqlCommand = @"SELECT [ID],[MasterEmailID],[ChatToEmailID],[Message] from [dbo].[ChatPrivateMessageDetails] where [AddedOn] > @AddedOn";
 
      using (SqlConnection con = new SqlConnection(conStr)) 
      { 
          SqlCommand cmd = new SqlCommand(sqlCommand, con); 
          cmd.Parameters.AddWithValue("@AddedOn", currentTime); 
          if (con.State != System.Data.ConnectionState.Open) 
          { 
              con.Open(); 
          }
 
          cmd.Notification = null; 
          SqlDependency sqlDep = new SqlDependency(cmd); 
          sqlDep.OnChange += sqlDep_Onchange; 
          using (SqlDataReader reader = cmd.ExecuteReader()) 
          {
 
          } 
      } 
}  
 
void sqlDep_Onchange(object sender, SqlNotificationEventArgs e)
{ 
      if (e.Type == SqlNotificationType.Change) 
      { 
          SqlDependency sqlDep = sender as SqlDependency; 
          sqlDep.OnChange -= sqlDep_Onchange; 
          string Connectionid = GetResult(); 
          var notificationHub = GlobalHost.ConnectionManager.GetHubContext<MyHub>(); 
          notificationHub.Clients.Client(Connectionid).notify("added");
          RegisterNotification(DateTime.Now); 
      } 
}  
 
public List<ChatPrivateMessageDetail> GetContacts(DateTime afterDate)
{ 
      using (Chat_PrivMsgDetail dc = new Chat_PrivMsgDetail()) 
      { 
          return dc.ChatPrivateMessageDetails.Where(a => a.AddedOn > afterDate).OrderByDescending(a => a.AddedOn).ToList(); 
      } 
  }

$div.find("#btnSendMessage").click(function () { 
    $textBox = $div.find("#txtPrivateMessage"); 
    var msg = $textBox.val(); 
    if (msg.length > 0) { 
        chatHub.server.sendPrivateMessage(userId, msg, 'Click'); 
        $(document).ready(function () { 
            $.ajax({ 
                type: 'POST', 
                url: '/TestFolder/Test.aspx/ProcessValue', 
                data: JSON.stringify({ value: userId }),
                 contentType: 'application/json; charset=utf-8', 
                dataType: 'json', 
                success: function (response) { 
                    response;
                },
                error: function (error) { 
                    error.responseText; 
                } 
            }); 
        });        
 
        $textBox.val(''); 
        $('#txtPrivateMessage').focus(); 
    } 
});