MVC 3 Razor view BeginForm is not posting to controller in FF, but works in IE 9 - asp.net-mvc-3

Question

I have a form in MVC 3 razor view that I am trying to post to my controller.
I need these:
1) Post the form to the controller action.
2) The action should do something with the data &return a string status (OK if success or NOK if failed)
3) Based on the result I might redirect the user after a brief delay.
4) I also want to prevent duplicate submission (if possible)
This is how my view looks (I trimmed it):
#model <MyNameSpace.Model>
#{
ViewBag.Title = "Save";
Layout = "~/Views/Shared/MyMaster.cshtml";
}
#using (Html.BeginForm("save", "my_controller"))
{
<div>
#Html.TextBoxFor(m => m.Host, new { #style = "width: 520px" })
... set other fields on the form ...
<input type="submit" id="btnSubmit" value="Submit"/>
</div>
}
This is my controller:
public String Save(<ModelName> model)
{
return "OK";
}
This seems working in IE9. But nothing happens in FF 4 or Opera. HttpFox shows no activity.
What is missing?
Thanks

Answer 1

In ASP.NET MVC it is considered good practice to have your controller actions return ActionResults instead of strings. This way proper content type headers will be set, etc...
So for example:
[HttpPost]
public ActionResult Save(ModelName model)
{
return Content("OK", "text/plain");
}
or if you wanted to return some view:
[HttpPost]
public ActionResult Save(ModelName model)
{
return View("Success");
}

Answer 2

Your example looks kosher, so either something critical is missing from your example code, or you need to view the generated HTML to see what's missing.

Answer 3

Did you omit the code that actually displayed the view to the user? I'm unsure of how this would function without a bit more. I mocked up your code and put in what I considered correct.
[HttpGet]
public ViewResult Save()
{
var vm = new ModelTest();
return View(vm);
}
[HttpPost]
public ActionResult Save(ModelTest model)
{
//do stuff with model
//Set a value in TempData -- Meets requirement of storing a status
TempData["Message"] = "OK";
//RedirectToRoute -- Meets requirement of preventing multiple posts partially. Some javascript will also help with this
RedirectToRoute("routename");
}
Post happened as expected in FF 4.01/5.0
Your model looks ok, it's just the controller code appears lacking.
Hopefully this helps.