diff --git a/app_pojavlauncher/src/main/java/net/kdt/pojavlaunch/fragments/BTAInstallFragment.java b/app_pojavlauncher/src/main/java/net/kdt/pojavlaunch/fragments/BTAInstallFragment.java
index 8033e13c8..07cbc6481 100644
--- a/app_pojavlauncher/src/main/java/net/kdt/pojavlaunch/fragments/BTAInstallFragment.java
+++ b/app_pojavlauncher/src/main/java/net/kdt/pojavlaunch/fragments/BTAInstallFragment.java
@@ -14,7 +14,12 @@ import java.io.File;
 import java.io.IOException;
 
 public class BTAInstallFragment extends ModVersionListFragment<BTAUtils.BTAVersionList> {
-    private static ModloaderListenerProxy sTaskProxy;
+    public static final String TAG = "BTAInstallFragment";
+
+    public BTAInstallFragment() {
+        super(TAG);
+    }
+
     @Override
     public int getTitleText() {
         return R.string.select_bta_version;
@@ -25,21 +30,11 @@ public class BTAInstallFragment extends ModVersionListFragment<BTAUtils.BTAVersi
         return R.string.modloader_dl_failed_to_load_list;
     }
 
-    @Override
-    public ModloaderListenerProxy getTaskProxy() {
-        return sTaskProxy;
-    }
-
     @Override
     public BTAUtils.BTAVersionList loadVersionList() throws IOException {
         return BTAUtils.downloadVersionList();
     }
 
-    @Override
-    public void setTaskProxy(ModloaderListenerProxy proxy) {
-        sTaskProxy = proxy;
-    }
-
     @Override
     public ExpandableListAdapter createAdapter(BTAUtils.BTAVersionList versionList, LayoutInflater layoutInflater) {
         return new BTAVersionListAdapter(versionList, layoutInflater);
diff --git a/app_pojavlauncher/src/main/java/net/kdt/pojavlaunch/fragments/FabricInstallFragment.java b/app_pojavlauncher/src/main/java/net/kdt/pojavlaunch/fragments/FabricInstallFragment.java
index 6bcc93b84..39a2ad33c 100644
--- a/app_pojavlauncher/src/main/java/net/kdt/pojavlaunch/fragments/FabricInstallFragment.java
+++ b/app_pojavlauncher/src/main/java/net/kdt/pojavlaunch/fragments/FabricInstallFragment.java
@@ -6,19 +6,8 @@ import net.kdt.pojavlaunch.modloaders.ModloaderListenerProxy;
 public class FabricInstallFragment extends FabriclikeInstallFragment {
 
     public static final String TAG = "FabricInstallFragment";
-    private static ModloaderListenerProxy sTaskProxy;
 
     public FabricInstallFragment() {
-        super(FabriclikeUtils.FABRIC_UTILS);
-    }
-
-    @Override
-    protected ModloaderListenerProxy getListenerProxy() {
-        return sTaskProxy;
-    }
-
-    @Override
-    protected void setListenerProxy(ModloaderListenerProxy listenerProxy) {
-        sTaskProxy = listenerProxy;
+        super(FabriclikeUtils.FABRIC_UTILS, TAG);
     }
 }
diff --git a/app_pojavlauncher/src/main/java/net/kdt/pojavlaunch/fragments/FabriclikeInstallFragment.java b/app_pojavlauncher/src/main/java/net/kdt/pojavlaunch/fragments/FabriclikeInstallFragment.java
index 5366fe58c..c8b38ae35 100644
--- a/app_pojavlauncher/src/main/java/net/kdt/pojavlaunch/fragments/FabriclikeInstallFragment.java
+++ b/app_pojavlauncher/src/main/java/net/kdt/pojavlaunch/fragments/FabriclikeInstallFragment.java
@@ -21,6 +21,7 @@ import androidx.fragment.app.Fragment;
 import net.kdt.pojavlaunch.PojavApplication;
 import net.kdt.pojavlaunch.R;
 import net.kdt.pojavlaunch.Tools;
+import net.kdt.pojavlaunch.extra.ExtraCore;
 import net.kdt.pojavlaunch.modloaders.FabriclikeDownloadTask;
 import net.kdt.pojavlaunch.modloaders.FabriclikeUtils;
 import net.kdt.pojavlaunch.modloaders.FabricVersion;
@@ -36,6 +37,7 @@ import java.util.concurrent.Future;
 
 public abstract class FabriclikeInstallFragment extends Fragment implements ModloaderDownloadListener, CompoundButton.OnCheckedChangeListener {
     private final FabriclikeUtils mFabriclikeUtils;
+    private final String mExtraTag;
     private Spinner mGameVersionSpinner;
     private FabricVersion[] mGameVersionArray;
     private Future<?> mGameVersionFuture;
@@ -48,9 +50,10 @@ public abstract class FabriclikeInstallFragment extends Fragment implements Modl
     private Button mStartButton;
     private View mRetryView;
     private CheckBox mOnlyStableCheckbox;
-    protected FabriclikeInstallFragment(FabriclikeUtils mFabriclikeUtils) {
+    protected FabriclikeInstallFragment(FabriclikeUtils mFabriclikeUtils, String mFragmentTag) {
         super(R.layout.fragment_fabric_install);
         this.mFabriclikeUtils = mFabriclikeUtils;
+        this.mExtraTag = mFragmentTag + "_proxy";
     }
 
     @Override
@@ -290,6 +293,10 @@ public abstract class FabriclikeInstallFragment extends Fragment implements Modl
         mGameVersionSpinner.setAdapter(createAdapter(mGameVersionArray, mOnlyStableCheckbox.isChecked()));
     }
 
-    protected abstract ModloaderListenerProxy getListenerProxy();
-    protected abstract void setListenerProxy(ModloaderListenerProxy listenerProxy);
+    private ModloaderListenerProxy getListenerProxy() {
+        return (ModloaderListenerProxy) ExtraCore.getValue(mExtraTag);
+    }
+    private void setListenerProxy(ModloaderListenerProxy listenerProxy) {
+        ExtraCore.setValue(mExtraTag, listenerProxy);
+    }
 }
diff --git a/app_pojavlauncher/src/main/java/net/kdt/pojavlaunch/fragments/ForgeInstallFragment.java b/app_pojavlauncher/src/main/java/net/kdt/pojavlaunch/fragments/ForgeInstallFragment.java
index 9455a23b4..bd58890b3 100644
--- a/app_pojavlauncher/src/main/java/net/kdt/pojavlaunch/fragments/ForgeInstallFragment.java
+++ b/app_pojavlauncher/src/main/java/net/kdt/pojavlaunch/fragments/ForgeInstallFragment.java
@@ -21,7 +21,9 @@ import java.util.List;
 
 public class ForgeInstallFragment extends ModVersionListFragment<List<String>> {
     public static final String TAG = "ForgeInstallFragment";
-    private static ModloaderListenerProxy sTaskProxy;
+    public ForgeInstallFragment() {
+        super(TAG);
+    }
 
     @Override
     public void onAttach(@NonNull Context context) {
@@ -38,15 +40,6 @@ public class ForgeInstallFragment extends ModVersionListFragment<List<String>> {
         return R.string.forge_dl_no_installer;
     }
 
-    @Override
-    public ModloaderListenerProxy getTaskProxy() {
-        return sTaskProxy;
-    }
-    @Override
-    public void setTaskProxy(ModloaderListenerProxy proxy) {
-        sTaskProxy = proxy;
-    }
-
     @Override
     public List<String> loadVersionList() throws IOException {
         return ForgeUtils.downloadForgeVersions();
diff --git a/app_pojavlauncher/src/main/java/net/kdt/pojavlaunch/fragments/ModVersionListFragment.java b/app_pojavlauncher/src/main/java/net/kdt/pojavlaunch/fragments/ModVersionListFragment.java
index 68530d2cf..1260cdde6 100644
--- a/app_pojavlauncher/src/main/java/net/kdt/pojavlaunch/fragments/ModVersionListFragment.java
+++ b/app_pojavlauncher/src/main/java/net/kdt/pojavlaunch/fragments/ModVersionListFragment.java
@@ -16,6 +16,7 @@ import androidx.fragment.app.Fragment;
 
 import net.kdt.pojavlaunch.R;
 import net.kdt.pojavlaunch.Tools;
+import net.kdt.pojavlaunch.extra.ExtraCore;
 import net.kdt.pojavlaunch.mirrors.DownloadMirror;
 import net.kdt.pojavlaunch.modloaders.ModloaderDownloadListener;
 import net.kdt.pojavlaunch.modloaders.ModloaderListenerProxy;
@@ -25,14 +26,15 @@ import java.io.File;
 import java.io.IOException;
 
 public abstract class ModVersionListFragment<T> extends Fragment implements Runnable, View.OnClickListener, ExpandableListView.OnChildClickListener, ModloaderDownloadListener {
-    public static final String TAG = "ForgeInstallFragment";
+    private final String mExtraTag;
     private ExpandableListView mExpandableListView;
     private ProgressBar mProgressBar;
     private LayoutInflater mInflater;
     private View mRetryView;
 
-    public ModVersionListFragment() {
+    public ModVersionListFragment(String mFragmentTag) {
         super(R.layout.fragment_mod_version_list);
+        this.mExtraTag = mFragmentTag + "_proxy";
     }
 
     @Override
@@ -148,11 +150,19 @@ public abstract class ModVersionListFragment<T> extends Fragment implements Runn
         });
     }
 
+    private void setTaskProxy(ModloaderListenerProxy proxy) {
+        ExtraCore.setValue(mExtraTag, proxy);
+    }
+
+    private ModloaderListenerProxy getTaskProxy() {
+        return (ModloaderListenerProxy) ExtraCore.getValue(mExtraTag);
+    }
+
     public abstract int getTitleText();
     public abstract int getNoDataMsg();
-    public abstract ModloaderListenerProxy getTaskProxy();
+
     public abstract T loadVersionList() throws IOException;
-    public abstract void setTaskProxy(ModloaderListenerProxy proxy);
+
     public abstract ExpandableListAdapter createAdapter(T versionList, LayoutInflater layoutInflater);
     public abstract Runnable createDownloadTask(Object selectedVersion, ModloaderListenerProxy listenerProxy);
     public abstract void onDownloadFinished(Context context, File downloadedFile);
diff --git a/app_pojavlauncher/src/main/java/net/kdt/pojavlaunch/fragments/OptiFineInstallFragment.java b/app_pojavlauncher/src/main/java/net/kdt/pojavlaunch/fragments/OptiFineInstallFragment.java
index abe7c0b39..8b5a32b15 100644
--- a/app_pojavlauncher/src/main/java/net/kdt/pojavlaunch/fragments/OptiFineInstallFragment.java
+++ b/app_pojavlauncher/src/main/java/net/kdt/pojavlaunch/fragments/OptiFineInstallFragment.java
@@ -7,7 +7,6 @@ import android.widget.ExpandableListAdapter;
 
 import net.kdt.pojavlaunch.JavaGUILauncherActivity;
 import net.kdt.pojavlaunch.R;
-import net.kdt.pojavlaunch.Tools;
 import net.kdt.pojavlaunch.modloaders.ModloaderListenerProxy;
 import net.kdt.pojavlaunch.modloaders.OptiFineDownloadTask;
 import net.kdt.pojavlaunch.modloaders.OptiFineUtils;
@@ -18,7 +17,9 @@ import java.io.IOException;
 
 public class OptiFineInstallFragment extends ModVersionListFragment<OptiFineUtils.OptiFineVersions> {
     public static final String TAG = "OptiFineInstallFragment";
-    private static ModloaderListenerProxy sTaskProxy;
+    public OptiFineInstallFragment() {
+        super(TAG);
+    }
     @Override
     public int getTitleText() {
         return R.string.of_dl_select_version;
@@ -28,22 +29,11 @@ public class OptiFineInstallFragment extends ModVersionListFragment<OptiFineUtil
     public int getNoDataMsg() {
         return R.string.of_dl_failed_to_scrape;
     }
-
-    @Override
-    public ModloaderListenerProxy getTaskProxy() {
-        return sTaskProxy;
-    }
-
     @Override
     public OptiFineUtils.OptiFineVersions loadVersionList() throws IOException {
         return OptiFineUtils.downloadOptiFineVersions();
     }
 
-    @Override
-    public void setTaskProxy(ModloaderListenerProxy proxy) {
-        sTaskProxy = proxy;
-    }
-
     @Override
     public ExpandableListAdapter createAdapter(OptiFineUtils.OptiFineVersions versionList, LayoutInflater layoutInflater) {
         return new OptiFineVersionListAdapter(versionList, layoutInflater);
diff --git a/app_pojavlauncher/src/main/java/net/kdt/pojavlaunch/fragments/QuiltInstallFragment.java b/app_pojavlauncher/src/main/java/net/kdt/pojavlaunch/fragments/QuiltInstallFragment.java
index f7356ed3d..c6c1d96a4 100644
--- a/app_pojavlauncher/src/main/java/net/kdt/pojavlaunch/fragments/QuiltInstallFragment.java
+++ b/app_pojavlauncher/src/main/java/net/kdt/pojavlaunch/fragments/QuiltInstallFragment.java
@@ -9,16 +9,6 @@ public class QuiltInstallFragment extends FabriclikeInstallFragment {
     private static ModloaderListenerProxy sTaskProxy;
 
     public QuiltInstallFragment() {
-        super(FabriclikeUtils.QUILT_UTILS);
-    }
-
-    @Override
-    protected ModloaderListenerProxy getListenerProxy() {
-        return sTaskProxy;
-    }
-
-    @Override
-    protected void setListenerProxy(ModloaderListenerProxy listenerProxy) {
-        sTaskProxy = listenerProxy;
+        super(FabriclikeUtils.QUILT_UTILS, TAG);
     }
 }