How do I prevent the refresh of my webview in the fragment?

In my app if I go from the first fragment to the third one, and I go back to the first one the webview restarts the page, how do I solve the problem?

obs: I'm a beginner so if possible have a little patience.     enter code here

> package com.cartolafcmidia.cartolafcnew;
> 
> import android.support.v4.view.ViewPager; import
> android.support.v7.app.AppCompatActivity; import android.os.Bundle;
> import android.webkit.WebSettings; import android.webkit.WebView;
> import android.webkit.WebViewClient; import
> com.cartolafcmidia.cartolafcnew.R; import
> com.cartolafcmidia.cartolafcnew.SiteFragment; import
> com.ogaclejapan.smarttablayout.SmartTabLayout; import
> com.ogaclejapan.smarttablayout.utils.v4.FragmentPagerItemAdapter;
> import com.ogaclejapan.smarttablayout.utils.v4.FragmentPagerItems;
> 
> public class MainActivity extends AppCompatActivity {
> 
>     private ViewPager ViewPager;
>     private SmartTabLayout smartTabLayout;
> 
> FragmentX fragmentX;
>     @Override
>     protected void onCreate(Bundle savedInstanceState) {
>         super.onCreate(savedInstanceState);
> 
> 
>         setContentView(R.layout.activity_main);
>         fragmentX = new FragmentX();
>         SiteFragment fragmentoSite = new  SiteFragment();
>         TwitterFragment fragmentoTwitter = new  TwitterFragment();
>         InstaFragment fragmentoInstagram = new  InstaFragment();
>         FaceFragment fragmentoFacebook = new  FaceFragment();
> 
> 
>                 ViewPager = findViewById(R.id.viewPager);
> 
> 
> 
>  smartTabLayout=findViewById(R.id.viewPagerTab); 
> getSupportActionBar().setElevation(0); 
> getSupportActionBar().setTitle("CartolaFC MÍDIAS");
> 
>         //Configurar Abas
>         FragmentPagerItemAdapter adapter = new FragmentPagerItemAdapter(
>                 getSupportFragmentManager(),
>                 FragmentPagerItems.with(this)
>                         .add("Site", SiteFragment.class)
>                         .add("Twitter", TwitterFragment.class)
>                         .add("Instagram", InstaFragment.class)
>                         .add("Facebook", FaceFragment.class)
> 
>                 .create()
>         ); ViewPager.setAdapter(adapter); smartTabLayout.setViewPager(ViewPager);
> 
> 
> 
>     } }

One of the fragments:

package com.cartolafcmidia.cartolafcnew;


import android.os.Bundle;
import android.support.annotation.NonNull;
import android.support.v4.app.Fragment;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.webkit.WebSettings;
import android.webkit.WebView;
import android.webkit.WebViewClient;


/**
 * A simple {@link Fragment} subclass.
 */
public class SiteFragment extends Fragment {


    public SiteFragment() {
        // Required empty public constructor
    }

    @Override
    public void onSaveInstanceState(Bundle outState) {
        super.onSaveInstanceState(outState);
        setRetainInstance(true);
    }

    @Override
    public View onCreateView(LayoutInflater inflater, ViewGroup container,
                             Bundle savedInstanceState ) {
        // Inflate the layout for this fragment
        View v =inflater.inflate(R.layout.fragment_site2, container, false);
        WebView webView =(WebView)v.findViewById(R.id.webView1);
        webView.getSettings().setJavaScriptEnabled(true);
        webView.setWebViewClient(new WebViewClient());
        setRetainInstance(true);
        setReturnTransition(true);
        //Desempenho
        webView.getSettings().setRenderPriority(WebSettings.RenderPriority.HIGH);
        webView.getSettings().setCacheMode(WebSettings.LOAD_NO_CACHE);
        webView.getSettings().setAppCacheEnabled(true);
        webView.setScrollBarStyle(View.SCROLLBARS_INSIDE_OVERLAY);
        webView.loadUrl("http://globoesporte.globo.com/cartola-fc/");
        setRetainInstance(true);
        return v;


    }

}