diff --git a/app/src/main/java/com/topjohnwu/magisk/MagiskFragment.java b/app/src/main/java/com/topjohnwu/magisk/MagiskFragment.java
index b40192aa1..71147e1f6 100644
--- a/app/src/main/java/com/topjohnwu/magisk/MagiskFragment.java
+++ b/app/src/main/java/com/topjohnwu/magisk/MagiskFragment.java
@@ -176,8 +176,8 @@ public class MagiskFragment extends Fragment
         shownDialog = false;
 
         // Trigger state check
-        if (Utils.checkNetworkStatus(mm)) {
-            new CheckUpdates(getActivity()).exec();
+        if (Utils.checkNetworkStatus()) {
+            new CheckUpdates().exec();
         } else {
             mSwipeRefreshLayout.setRefreshing(false);
         }
@@ -230,7 +230,7 @@ public class MagiskFragment extends Fragment
     private void updateUI() {
         ((MainActivity) getActivity()).checkHideSection();
 
-        boolean hasNetwork = Utils.checkNetworkStatus(getActivity());
+        boolean hasNetwork = Utils.checkNetworkStatus();
         boolean hasRoot = Shell.rootAccess();
         boolean isUpToDate = mm.magiskVersionCode > 1300;
 
diff --git a/app/src/main/java/com/topjohnwu/magisk/MagiskLogFragment.java b/app/src/main/java/com/topjohnwu/magisk/MagiskLogFragment.java
index 6612cc34a..05e1008e5 100644
--- a/app/src/main/java/com/topjohnwu/magisk/MagiskLogFragment.java
+++ b/app/src/main/java/com/topjohnwu/magisk/MagiskLogFragment.java
@@ -170,9 +170,9 @@ public class MagiskLogFragment extends Fragment {
                 case 2:
                     boolean bool = (boolean) o;
                     if (bool) {
-                        getMagiskManager().toast(targetFile.toString(), Toast.LENGTH_LONG);
+                        MagiskManager.toast(targetFile.toString(), Toast.LENGTH_LONG);
                     } else {
-                        getMagiskManager().toast(R.string.logs_save_failed, Toast.LENGTH_LONG);
+                        MagiskManager.toast(R.string.logs_save_failed, Toast.LENGTH_LONG);
                     }
                     break;
             }
diff --git a/app/src/main/java/com/topjohnwu/magisk/MagiskManager.java b/app/src/main/java/com/topjohnwu/magisk/MagiskManager.java
index 670cada36..cc813c58c 100644
--- a/app/src/main/java/com/topjohnwu/magisk/MagiskManager.java
+++ b/app/src/main/java/com/topjohnwu/magisk/MagiskManager.java
@@ -32,6 +32,7 @@ import com.topjohnwu.magisk.utils.Utils;
 
 import java.io.IOException;
 import java.io.InputStream;
+import java.lang.ref.WeakReference;
 import java.util.List;
 import java.util.Locale;
 import java.util.Map;
@@ -39,6 +40,9 @@ import java.util.concurrent.ExecutionException;
 
 public class MagiskManager extends Application {
 
+    // Global weak reference to self
+    private static WeakReference<MagiskManager> weakSelf;
+
     public static final String MAGISK_DISABLE_FILE = "/cache/.disable_magisk";
     public static final String MAGISK_HOST_FILE = "/magisk/.core/hosts";
     public static final String TMP_FOLDER_PATH = "/dev/tmp";
@@ -110,21 +114,17 @@ public class MagiskManager extends Application {
     private static Handler mHandler = new Handler();
     private boolean started = false;
 
-    private static class LoadLocale extends ParallelTask<Void, Void, Void> {
-
-        LoadLocale(Context context) {
-            super(context);
-        }
+    private class LoadLocale extends ParallelTask<Void, Void, Void> {
 
         @Override
         protected Void doInBackground(Void... voids) {
-            getMagiskManager().locales = Utils.getAvailableLocale(getMagiskManager());
+            locales = Utils.getAvailableLocale();
             return null;
         }
 
         @Override
         protected void onPostExecute(Void aVoid) {
-            getMagiskManager().localeDone.publish();
+            localeDone.publish();
         }
     }
 
@@ -137,15 +137,20 @@ public class MagiskManager extends Application {
             // Don't migrate yet, wait and check Magisk version
             suDB = new SuDatabaseHelper(this);
         } else {
-            suDB = new SuDatabaseHelper(Utils.getEncContext(this));
+            suDB = new SuDatabaseHelper(Utils.getEncContext());
         }
 
+        weakSelf = new WeakReference<>(this);
         repoDB = new RepoDatabaseHelper(this);
         defaultLocale = Locale.getDefault();
         setLocale();
         loadConfig();
     }
 
+    public static MagiskManager get() {
+        return weakSelf.get();
+    }
+
     public void setLocale() {
         localeConfig = prefs.getString("locale", "");
         if (localeConfig.isEmpty()) {
@@ -177,12 +182,12 @@ public class MagiskManager extends Application {
         snet_version = prefs.getInt("snet_version", -1);
     }
 
-    public void toast(String msg, int duration) {
-        mHandler.post(() -> Toast.makeText(this, msg, duration).show());
+    public static void toast(String msg, int duration) {
+        mHandler.post(() -> Toast.makeText(weakSelf.get(), msg, duration).show());
     }
 
-    public void toast(int resId, int duration) {
-        mHandler.post(() -> Toast.makeText(this, resId, duration).show());
+    public static void toast(int resId, int duration) {
+        mHandler.post(() -> Toast.makeText(weakSelf.get(), resId, duration).show());
     }
 
     public void startup() {
@@ -190,7 +195,7 @@ public class MagiskManager extends Application {
             return;
         started = true;
 
-        boolean hasNetwork = Utils.checkNetworkStatus(this);
+        boolean hasNetwork = Utils.checkNetworkStatus();
 
         getMagiskInfo();
 
@@ -204,14 +209,14 @@ public class MagiskManager extends Application {
             }
         }
 
-        new LoadLocale(this).exec();
+        new LoadLocale().exec();
 
         // Root actions
         if (Shell.rootAccess()) {
             if (hasNetwork && !Utils.itemExist(BUSYBOXPATH + "/busybox")) {
                 try {
                     // Force synchronous, make sure we have busybox to use
-                    new DownloadBusybox(this).exec().get();
+                    new DownloadBusybox().exec().get();
                 } catch (InterruptedException | ExecutionException e) {
                     e.printStackTrace();
                 }
@@ -265,7 +270,7 @@ public class MagiskManager extends Application {
             getSystemService(NotificationManager.class).createNotificationChannel(channel);
         }
 
-        LoadModules loadModuleTask = new LoadModules(this);
+        LoadModules loadModuleTask = new LoadModules();
         // Start update check job
         if (hasNetwork) {
             ComponentName service = new ComponentName(this, UpdateCheckService.class);
@@ -275,7 +280,7 @@ public class MagiskManager extends Application {
                     .setPeriodic(8 * 60 * 60 * 1000)
                     .build();
             ((JobScheduler) getSystemService(Context.JOB_SCHEDULER_SERVICE)).schedule(jobInfo);
-            loadModuleTask.setCallBack(() -> new UpdateRepos(this, false).exec());
+            loadModuleTask.setCallBack(() -> new UpdateRepos(false).exec());
         }
         // Fire asynctasks
         loadModuleTask.exec();
@@ -284,7 +289,6 @@ public class MagiskManager extends Application {
 
     public void getMagiskInfo() {
         List<String> ret;
-        Shell.registerShell(this);
         ret = Shell.sh("su -v");
         if (Utils.isValidShellResponse(ret)) {
             suVersion = ret.get(0);
diff --git a/app/src/main/java/com/topjohnwu/magisk/MainActivity.java b/app/src/main/java/com/topjohnwu/magisk/MainActivity.java
index 5190601ee..f655e0016 100644
--- a/app/src/main/java/com/topjohnwu/magisk/MainActivity.java
+++ b/app/src/main/java/com/topjohnwu/magisk/MainActivity.java
@@ -118,7 +118,7 @@ public class MainActivity extends Activity
                         && prefs.getBoolean("magiskhide", false));
         menu.findItem(R.id.modules).setVisible(
                 Shell.rootAccess() && getMagiskManager().magiskVersionCode >= 0);
-        menu.findItem(R.id.downloads).setVisible(Utils.checkNetworkStatus(this) &&
+        menu.findItem(R.id.downloads).setVisible(Utils.checkNetworkStatus() &&
                 Shell.rootAccess() && getMagiskManager().magiskVersionCode >= 0);
         menu.findItem(R.id.log).setVisible(Shell.rootAccess());
         menu.findItem(R.id.superuser).setVisible(
diff --git a/app/src/main/java/com/topjohnwu/magisk/ModulesFragment.java b/app/src/main/java/com/topjohnwu/magisk/ModulesFragment.java
index b314e1a29..238d279fd 100644
--- a/app/src/main/java/com/topjohnwu/magisk/ModulesFragment.java
+++ b/app/src/main/java/com/topjohnwu/magisk/ModulesFragment.java
@@ -54,7 +54,7 @@ public class ModulesFragment extends Fragment implements Topic.Subscriber {
 
         mSwipeRefreshLayout.setOnRefreshListener(() -> {
             recyclerView.setVisibility(View.GONE);
-            new LoadModules(getActivity()).exec();
+            new LoadModules().exec();
         });
 
         recyclerView.addOnScrollListener(new RecyclerView.OnScrollListener() {
diff --git a/app/src/main/java/com/topjohnwu/magisk/ReposFragment.java b/app/src/main/java/com/topjohnwu/magisk/ReposFragment.java
index 4d144439d..b73fe4b15 100644
--- a/app/src/main/java/com/topjohnwu/magisk/ReposFragment.java
+++ b/app/src/main/java/com/topjohnwu/magisk/ReposFragment.java
@@ -47,7 +47,7 @@ public class ReposFragment extends Fragment implements Topic.Subscriber {
         mSwipeRefreshLayout.setOnRefreshListener(() -> {
             recyclerView.setVisibility(View.VISIBLE);
             emptyRv.setVisibility(View.GONE);
-            new UpdateRepos(getActivity(), true).exec();
+            new UpdateRepos(true).exec();
         });
 
         getActivity().setTitle(R.string.downloads);
diff --git a/app/src/main/java/com/topjohnwu/magisk/SettingsActivity.java b/app/src/main/java/com/topjohnwu/magisk/SettingsActivity.java
index 08dd4ad97..935c30952 100644
--- a/app/src/main/java/com/topjohnwu/magisk/SettingsActivity.java
+++ b/app/src/main/java/com/topjohnwu/magisk/SettingsActivity.java
@@ -121,14 +121,14 @@ public class SettingsActivity extends Activity implements Topic.Subscriber {
             findPreference("clear").setOnPreferenceClickListener((pref) -> {
                 mm.prefs.edit().remove(UpdateRepos.ETAG_KEY).apply();
                 mm.repoDB.clearRepo();
-                mm.toast(R.string.repo_cache_cleared, Toast.LENGTH_SHORT);
+                MagiskManager.toast(R.string.repo_cache_cleared, Toast.LENGTH_SHORT);
                 return true;
             });
 
             hideManager.setOnPreferenceClickListener((pref) -> {
                 Utils.runWithPermission(getActivity(),
                         Manifest.permission.WRITE_EXTERNAL_STORAGE,
-                        () -> new HideManager(getActivity()).exec());
+                        () -> new HideManager().exec());
                 return true;
             });
 
@@ -239,7 +239,7 @@ public class SettingsActivity extends Activity implements Topic.Subscriber {
                     break;
                 case "update_channel":
                     mm.updateChannel = Utils.getPrefsInt(prefs, "update_channel");
-                    new CheckUpdates(mm, true).exec();
+                    new CheckUpdates(true).exec();
                     break;
             }
             mm.loadConfig();
diff --git a/app/src/main/java/com/topjohnwu/magisk/asyncs/CheckSafetyNet.java b/app/src/main/java/com/topjohnwu/magisk/asyncs/CheckSafetyNet.java
index 20836efc6..543f399e9 100644
--- a/app/src/main/java/com/topjohnwu/magisk/asyncs/CheckSafetyNet.java
+++ b/app/src/main/java/com/topjohnwu/magisk/asyncs/CheckSafetyNet.java
@@ -33,7 +33,7 @@ public class CheckSafetyNet extends ParallelTask<Void, Void, Exception> {
 
     @Override
     protected void onPreExecute() {
-        MagiskManager mm = getMagiskManager();
+        MagiskManager mm = MagiskManager.get();
         if (mm.snet_version != CheckSafetyNet.SNET_VER) {
             Shell.sh("rm -rf " + dexPath.getParent());
         }
@@ -72,13 +72,13 @@ public class CheckSafetyNet extends ParallelTask<Void, Void, Exception> {
             Object helper = helperClazz.getConstructors()[0].newInstance(
                     getActivity(), Proxy.newProxyInstance(
                             loader, new Class[] { callbackClazz }, (proxy, method, args) -> {
-                                getMagiskManager().safetyNetDone.publish(false, args[0]);
+                                MagiskManager.get().safetyNetDone.publish(false, args[0]);
                                 return null;
                             }));
             helperClazz.getMethod("attest").invoke(helper);
         } catch (Exception e) {
             e.printStackTrace();
-            getMagiskManager().safetyNetDone.publish(false, -1);
+            MagiskManager.get().safetyNetDone.publish(false, -1);
         }
         super.onPostExecute(err);
     }
diff --git a/app/src/main/java/com/topjohnwu/magisk/asyncs/CheckUpdates.java b/app/src/main/java/com/topjohnwu/magisk/asyncs/CheckUpdates.java
index 0e94b4d45..6d50f0ee1 100644
--- a/app/src/main/java/com/topjohnwu/magisk/asyncs/CheckUpdates.java
+++ b/app/src/main/java/com/topjohnwu/magisk/asyncs/CheckUpdates.java
@@ -1,7 +1,5 @@
 package com.topjohnwu.magisk.asyncs;
 
-import android.content.Context;
-
 import com.topjohnwu.magisk.BuildConfig;
 import com.topjohnwu.magisk.MagiskManager;
 import com.topjohnwu.magisk.utils.ShowUI;
@@ -18,21 +16,19 @@ public class CheckUpdates extends ParallelTask<Void, Void, Void> {
     private static final String STABLE_URL = "https://raw.githubusercontent.com/topjohnwu/MagiskManager/update/stable.json";
     private static final String BETA_URL = "https://raw.githubusercontent.com/topjohnwu/MagiskManager/update/beta.json";
 
-    private boolean showNotification = false;
+    private boolean showNotification;
 
-    public CheckUpdates(Context context) {
-        super(context);
+    public CheckUpdates() {
+        this(false);
     }
 
-    public CheckUpdates(Context context, boolean b) {
-        super(context);
+    public CheckUpdates(boolean b) {
         showNotification = b;
     }
 
     @Override
     protected Void doInBackground(Void... voids) {
-        MagiskManager mm = getMagiskManager();
-        if (mm == null) return null;
+        MagiskManager mm = MagiskManager.get();
         String jsonStr;
         switch (mm.updateChannel) {
             case STABLE_CHANNEL:
@@ -61,13 +57,12 @@ public class CheckUpdates extends ParallelTask<Void, Void, Void> {
 
     @Override
     protected void onPostExecute(Void v) {
-        MagiskManager mm = getMagiskManager();
-        if (mm == null) return;
+        MagiskManager mm = MagiskManager.get();
         if (showNotification && mm.updateNotification) {
             if (BuildConfig.VERSION_CODE < mm.remoteManagerVersionCode) {
-                ShowUI.showManagerUpdateNotification(mm);
+                ShowUI.showManagerUpdateNotification();
             } else if (mm.magiskVersionCode < mm.remoteMagiskVersionCode) {
-                ShowUI.showMagiskUpdateNotification(mm);
+                ShowUI.showMagiskUpdateNotification();
             }
         }
         mm.updateCheckDone.publish();
diff --git a/app/src/main/java/com/topjohnwu/magisk/asyncs/DownloadBusybox.java b/app/src/main/java/com/topjohnwu/magisk/asyncs/DownloadBusybox.java
index a8e041b22..01292beab 100644
--- a/app/src/main/java/com/topjohnwu/magisk/asyncs/DownloadBusybox.java
+++ b/app/src/main/java/com/topjohnwu/magisk/asyncs/DownloadBusybox.java
@@ -21,14 +21,10 @@ public class DownloadBusybox extends ParallelTask<Void, Void, Void> {
 
     private File busybox;
 
-    public DownloadBusybox(Context context) {
-        super(context);
-        busybox = new File(context.getCacheDir(), "busybox");
-    }
-
     @Override
     protected Void doInBackground(Void... voids) {
-        Context context = getMagiskManager();
+        Context context = MagiskManager.get();
+        busybox = new File(context.getCacheDir(), "busybox");
         Utils.removeItem(context.getApplicationInfo().dataDir + "/busybox");
         try {
             FileOutputStream out  = new FileOutputStream(busybox);
diff --git a/app/src/main/java/com/topjohnwu/magisk/asyncs/FlashZip.java b/app/src/main/java/com/topjohnwu/magisk/asyncs/FlashZip.java
index 31ce9570a..2dce04092 100644
--- a/app/src/main/java/com/topjohnwu/magisk/asyncs/FlashZip.java
+++ b/app/src/main/java/com/topjohnwu/magisk/asyncs/FlashZip.java
@@ -53,8 +53,7 @@ public class FlashZip extends ParallelTask<Void, Void, Integer> {
 
     @Override
     protected Integer doInBackground(Void... voids) {
-        MagiskManager mm = getMagiskManager();
-        if (mm == null) return -1;
+        MagiskManager mm = MagiskManager.get();
         try {
             mList.add("- Copying zip to temp directory");
 
@@ -94,8 +93,7 @@ public class FlashZip extends ParallelTask<Void, Void, Integer> {
     // -1 = error, manual install; 0 = invalid zip; 1 = success
     @Override
     protected void onPostExecute(Integer result) {
-        MagiskManager mm = getMagiskManager();
-        if (mm == null) return;
+        MagiskManager mm = MagiskManager.get();
         Shell.su_raw(
                 "rm -rf " + mCachedFile.getParent(),
                 "rm -rf " + MagiskManager.TMP_FOLDER_PATH
@@ -110,7 +108,7 @@ public class FlashZip extends ParallelTask<Void, Void, Integer> {
                 break;
             case 1:
                 // Success
-                new LoadModules(mm).exec();
+                new LoadModules().exec();
                 break;
         }
         super.onPostExecute(result);
diff --git a/app/src/main/java/com/topjohnwu/magisk/asyncs/HideManager.java b/app/src/main/java/com/topjohnwu/magisk/asyncs/HideManager.java
index 5069ddd4a..a83ada077 100644
--- a/app/src/main/java/com/topjohnwu/magisk/asyncs/HideManager.java
+++ b/app/src/main/java/com/topjohnwu/magisk/asyncs/HideManager.java
@@ -1,6 +1,5 @@
 package com.topjohnwu.magisk.asyncs;
 
-import android.content.Context;
 import android.content.pm.PackageManager;
 import android.os.Environment;
 import android.widget.Toast;
@@ -24,10 +23,6 @@ public class HideManager extends ParallelTask<Void, Void, Boolean> {
     private static final String ANDROID_MANIFEST = "AndroidManifest.xml";
     private static final byte[] UNHIDE_PKG_NAME = "com.topjohnwu.unhide\0".getBytes();
 
-    public HideManager(Context context) {
-        super(context);
-    }
-
     private String genPackageName(String prefix, int length) {
         StringBuilder builder = new StringBuilder(length);
         builder.append(prefix);
@@ -51,14 +46,12 @@ public class HideManager extends ParallelTask<Void, Void, Boolean> {
 
     @Override
     protected void onPreExecute() {
-        getMagiskManager().toast(R.string.hide_manager_toast, Toast.LENGTH_SHORT);
+        MagiskManager.toast(R.string.hide_manager_toast, Toast.LENGTH_SHORT);
     }
 
     @Override
     protected Boolean doInBackground(Void... voids) {
-        MagiskManager mm = getMagiskManager();
-        if (mm == null)
-            return false;
+        MagiskManager mm = MagiskManager.get();
 
         // Generate a new unhide app with random package name
         File unhideAPK = new File(Environment.getExternalStorageDirectory() + "/MagiskManager", "unhide.apk");
@@ -127,11 +120,8 @@ public class HideManager extends ParallelTask<Void, Void, Boolean> {
 
     @Override
     protected void onPostExecute(Boolean b) {
-        MagiskManager mm = getMagiskManager();
-        if (mm == null)
-            return;
         if (!b) {
-            mm.toast(R.string.hide_manager_fail_toast, Toast.LENGTH_LONG);
+            MagiskManager.toast(R.string.hide_manager_fail_toast, Toast.LENGTH_LONG);
         }
         super.onPostExecute(b);
     }
diff --git a/app/src/main/java/com/topjohnwu/magisk/asyncs/InstallMagisk.java b/app/src/main/java/com/topjohnwu/magisk/asyncs/InstallMagisk.java
index 94e1604ef..75a95a896 100644
--- a/app/src/main/java/com/topjohnwu/magisk/asyncs/InstallMagisk.java
+++ b/app/src/main/java/com/topjohnwu/magisk/asyncs/InstallMagisk.java
@@ -72,10 +72,9 @@ public class InstallMagisk extends ParallelTask<Void, Void, Boolean> {
 
     @Override
     protected Boolean doInBackground(Void... voids) {
-        MagiskManager mm = getMagiskManager();
-        if (mm == null) return false;
+        MagiskManager mm = MagiskManager.get();
 
-        File install = new File(Utils.getEncContext(mm).getFilesDir().getParent(), "install");
+        File install = new File(Utils.getEncContext().getFilesDir().getParent(), "install");
         Shell.sh_raw("rm -rf " + install);
 
         List<String> abis = Arrays.asList(Build.SUPPORTED_ABIS);
diff --git a/app/src/main/java/com/topjohnwu/magisk/asyncs/LoadModules.java b/app/src/main/java/com/topjohnwu/magisk/asyncs/LoadModules.java
index e1042d60a..858266a8e 100644
--- a/app/src/main/java/com/topjohnwu/magisk/asyncs/LoadModules.java
+++ b/app/src/main/java/com/topjohnwu/magisk/asyncs/LoadModules.java
@@ -1,7 +1,5 @@
 package com.topjohnwu.magisk.asyncs;
 
-import android.content.Context;
-
 import com.topjohnwu.magisk.MagiskManager;
 import com.topjohnwu.magisk.container.Module;
 import com.topjohnwu.magisk.container.ValueSortedMap;
@@ -11,10 +9,6 @@ import java.util.List;
 
 public class LoadModules extends ParallelTask<Void, Void, Void> {
 
-    public LoadModules(Context context) {
-        super(context);
-    }
-
     private List<String> getModList() {
         String command = "ls -d " + MagiskManager.MAGISK_PATH + "/* | grep -v lost+found";
         return Shell.su(command);
@@ -22,8 +16,7 @@ public class LoadModules extends ParallelTask<Void, Void, Void> {
 
     @Override
     protected Void doInBackground(Void... voids) {
-        MagiskManager mm = getMagiskManager();
-        if (mm == null) return null;
+        MagiskManager mm = MagiskManager.get();
         mm.moduleMap = new ValueSortedMap<>();
 
         for (String path : getModList()) {
@@ -36,9 +29,7 @@ public class LoadModules extends ParallelTask<Void, Void, Void> {
 
     @Override
     protected void onPostExecute(Void v) {
-        MagiskManager mm = getMagiskManager();
-        if (mm == null) return;
-        mm.moduleLoadDone.publish();
+        MagiskManager.get().moduleLoadDone.publish();
         super.onPostExecute(v);
     }
 }
diff --git a/app/src/main/java/com/topjohnwu/magisk/asyncs/MarkDownWindow.java b/app/src/main/java/com/topjohnwu/magisk/asyncs/MarkDownWindow.java
index 7a9b8cdf1..e5f74951e 100644
--- a/app/src/main/java/com/topjohnwu/magisk/asyncs/MarkDownWindow.java
+++ b/app/src/main/java/com/topjohnwu/magisk/asyncs/MarkDownWindow.java
@@ -4,6 +4,7 @@ import android.app.Activity;
 import android.support.v7.app.AlertDialog;
 import android.webkit.WebView;
 
+import com.topjohnwu.magisk.MagiskManager;
 import com.topjohnwu.magisk.R;
 import com.topjohnwu.magisk.utils.WebService;
 
@@ -29,7 +30,7 @@ public class MarkDownWindow extends ParallelTask<Void, Void, String> {
         Node doc = parser.parse(md);
         return String.format(
                 "<link rel='stylesheet' type='text/css' href='file:///android_asset/%s.css'/> %s",
-                getMagiskManager().isDarkTheme ? "dark" : "light", renderer.render(doc));
+                MagiskManager.get().isDarkTheme ? "dark" : "light", renderer.render(doc));
     }
 
     @Override
diff --git a/app/src/main/java/com/topjohnwu/magisk/asyncs/ParallelTask.java b/app/src/main/java/com/topjohnwu/magisk/asyncs/ParallelTask.java
index 723d89b1d..5f087967d 100644
--- a/app/src/main/java/com/topjohnwu/magisk/asyncs/ParallelTask.java
+++ b/app/src/main/java/com/topjohnwu/magisk/asyncs/ParallelTask.java
@@ -1,7 +1,6 @@
 package com.topjohnwu.magisk.asyncs;
 
 import android.app.Activity;
-import android.content.Context;
 import android.os.AsyncTask;
 
 import com.topjohnwu.magisk.MagiskManager;
@@ -12,18 +11,12 @@ import java.lang.ref.WeakReference;
 public abstract class ParallelTask<Params, Progress, Result> extends AsyncTask<Params, Progress, Result> {
 
     private WeakReference<Activity> weakActivity;
-    private WeakReference<MagiskManager> weakMagiskManager;
 
     private Runnable callback = null;
 
     public ParallelTask() {}
 
-    public ParallelTask(Context context) {
-        weakMagiskManager = new WeakReference<>(Utils.getMagiskManager(context));
-    }
-
     public ParallelTask(Activity context) {
-        this((Context) context);
         weakActivity = new WeakReference<>(context);
     }
 
@@ -31,10 +24,6 @@ public abstract class ParallelTask<Params, Progress, Result> extends AsyncTask<P
         return weakActivity.get();
     }
 
-    protected MagiskManager getMagiskManager() {
-        return weakMagiskManager.get();
-    }
-
     @SuppressWarnings("unchecked")
     public ParallelTask<Params, Progress, Result> exec(Params... params) {
         executeOnExecutor(AsyncTask.THREAD_POOL_EXECUTOR, params);
diff --git a/app/src/main/java/com/topjohnwu/magisk/asyncs/ProcessRepoZip.java b/app/src/main/java/com/topjohnwu/magisk/asyncs/ProcessRepoZip.java
index 485379261..2eba9eb10 100644
--- a/app/src/main/java/com/topjohnwu/magisk/asyncs/ProcessRepoZip.java
+++ b/app/src/main/java/com/topjohnwu/magisk/asyncs/ProcessRepoZip.java
@@ -10,6 +10,7 @@ import android.support.annotation.NonNull;
 import android.widget.Toast;
 
 import com.topjohnwu.magisk.FlashActivity;
+import com.topjohnwu.magisk.MagiskManager;
 import com.topjohnwu.magisk.R;
 import com.topjohnwu.magisk.container.InputStreamWrapper;
 import com.topjohnwu.magisk.utils.Shell;
@@ -175,7 +176,7 @@ public class ProcessRepoZip extends ParallelTask<Void, Object, Boolean> {
                 Utils.showUriSnack(activity, uri);
             }
         } else {
-            Utils.getMagiskManager(activity).toast(R.string.process_error, Toast.LENGTH_LONG);
+            MagiskManager.toast(R.string.process_error, Toast.LENGTH_LONG);
         }
         super.onPostExecute(result);
     }
diff --git a/app/src/main/java/com/topjohnwu/magisk/asyncs/RestoreStockBoot.java b/app/src/main/java/com/topjohnwu/magisk/asyncs/RestoreStockBoot.java
index c67f4c75e..fd6717c0d 100644
--- a/app/src/main/java/com/topjohnwu/magisk/asyncs/RestoreStockBoot.java
+++ b/app/src/main/java/com/topjohnwu/magisk/asyncs/RestoreStockBoot.java
@@ -1,8 +1,8 @@
 package com.topjohnwu.magisk.asyncs;
 
-import android.content.Context;
 import android.widget.Toast;
 
+import com.topjohnwu.magisk.MagiskManager;
 import com.topjohnwu.magisk.R;
 import com.topjohnwu.magisk.utils.Shell;
 import com.topjohnwu.magisk.utils.Utils;
@@ -13,8 +13,7 @@ public class RestoreStockBoot extends ParallelTask<Void, Void, Boolean> {
 
     private String mBoot;
 
-    public RestoreStockBoot(Context context, String boot) {
-        super(context);
+    public RestoreStockBoot(String boot) {
         mBoot = boot;
     }
 
@@ -33,9 +32,9 @@ public class RestoreStockBoot extends ParallelTask<Void, Void, Boolean> {
     @Override
     protected void onPostExecute(Boolean result) {
         if (result) {
-            getMagiskManager().toast(R.string.restore_done, Toast.LENGTH_SHORT);
+            MagiskManager.toast(R.string.restore_done, Toast.LENGTH_SHORT);
         } else {
-            getMagiskManager().toast(R.string.restore_fail, Toast.LENGTH_LONG);
+            MagiskManager.toast(R.string.restore_fail, Toast.LENGTH_LONG);
         }
     }
 }
diff --git a/app/src/main/java/com/topjohnwu/magisk/asyncs/UpdateRepos.java b/app/src/main/java/com/topjohnwu/magisk/asyncs/UpdateRepos.java
index 17f3f8ab7..f301a97b1 100644
--- a/app/src/main/java/com/topjohnwu/magisk/asyncs/UpdateRepos.java
+++ b/app/src/main/java/com/topjohnwu/magisk/asyncs/UpdateRepos.java
@@ -1,6 +1,5 @@
 package com.topjohnwu.magisk.asyncs;
 
-import android.content.Context;
 import android.content.SharedPreferences;
 import android.os.AsyncTask;
 
@@ -44,13 +43,13 @@ public class UpdateRepos extends ParallelTask<Void, Void, Void> {
 
     private int tasks = 0;
 
-    public UpdateRepos(Context context, boolean force) {
-        super(context);
-        prefs = getMagiskManager().prefs;
-        repoDB = getMagiskManager().repoDB;
-        getMagiskManager().repoLoadDone.hasPublished = false;
+    public UpdateRepos(boolean force) {
+        MagiskManager mm = MagiskManager.get();
+        prefs = mm.prefs;
+        repoDB = mm.repoDB;
+        mm.repoLoadDone.hasPublished = false;
         // Legacy data cleanup
-        File old = new File(context.getApplicationInfo().dataDir + "/shared_prefs", "RepoMap.xml");
+        File old = new File(mm.getApplicationInfo().dataDir + "/shared_prefs", "RepoMap.xml");
         if (old.exists() || prefs.getString("repomap", null) != null) {
             old.delete();
             prefs.edit().remove("version").remove("repomap").remove(ETAG_KEY).apply();
@@ -211,9 +210,7 @@ public class UpdateRepos extends ParallelTask<Void, Void, Void> {
 
     @Override
     protected void onPostExecute(Void v) {
-        MagiskManager mm = getMagiskManager();
-        if (mm == null) return;
-        mm.repoLoadDone.publish();
+        MagiskManager.get().repoLoadDone.publish();
         super.onPostExecute(v);
     }
 }
diff --git a/app/src/main/java/com/topjohnwu/magisk/receivers/DownloadReceiver.java b/app/src/main/java/com/topjohnwu/magisk/receivers/DownloadReceiver.java
index 979ab7a25..3500e02b4 100644
--- a/app/src/main/java/com/topjohnwu/magisk/receivers/DownloadReceiver.java
+++ b/app/src/main/java/com/topjohnwu/magisk/receivers/DownloadReceiver.java
@@ -8,6 +8,7 @@ import android.database.Cursor;
 import android.net.Uri;
 import android.widget.Toast;
 
+import com.topjohnwu.magisk.MagiskManager;
 import com.topjohnwu.magisk.R;
 import com.topjohnwu.magisk.utils.Utils;
 
@@ -34,7 +35,7 @@ public abstract class DownloadReceiver extends BroadcastReceiver {
                         onDownloadDone(uri);
                         break;
                     default:
-                        Utils.getMagiskManager(context).toast(R.string.download_file_error, Toast.LENGTH_LONG);
+                        MagiskManager.toast(R.string.download_file_error, Toast.LENGTH_LONG);
                         break;
                 }
                 context.unregisterReceiver(this);
diff --git a/app/src/main/java/com/topjohnwu/magisk/services/UpdateCheckService.java b/app/src/main/java/com/topjohnwu/magisk/services/UpdateCheckService.java
index b67aae8ca..be132f0f1 100644
--- a/app/src/main/java/com/topjohnwu/magisk/services/UpdateCheckService.java
+++ b/app/src/main/java/com/topjohnwu/magisk/services/UpdateCheckService.java
@@ -11,7 +11,7 @@ public class UpdateCheckService extends JobService {
     @Override
     public boolean onStartJob(JobParameters params) {
         Utils.getMagiskManager(this).getMagiskInfo();
-        new CheckUpdates(this, true)
+        new CheckUpdates(true)
                 .setCallBack(() -> jobFinished(params, false)).exec();
         return true;
     }
diff --git a/app/src/main/java/com/topjohnwu/magisk/superuser/SuReceiver.java b/app/src/main/java/com/topjohnwu/magisk/superuser/SuReceiver.java
index 167d90305..c576c8665 100644
--- a/app/src/main/java/com/topjohnwu/magisk/superuser/SuReceiver.java
+++ b/app/src/main/java/com/topjohnwu/magisk/superuser/SuReceiver.java
@@ -37,7 +37,7 @@ public class SuReceiver extends BroadcastReceiver {
         if (mode < 0) return;
 
         if (mode == NOTIFY_USER_TO_OWNER) {
-            magiskManager.toast(R.string.multiuser_hint_owner_request, Toast.LENGTH_LONG);
+            MagiskManager.toast(R.string.multiuser_hint_owner_request, Toast.LENGTH_LONG);
             return;
         }
 
diff --git a/app/src/main/java/com/topjohnwu/magisk/utils/Shell.java b/app/src/main/java/com/topjohnwu/magisk/utils/Shell.java
index 366a8620c..f98ab61dc 100644
--- a/app/src/main/java/com/topjohnwu/magisk/utils/Shell.java
+++ b/app/src/main/java/com/topjohnwu/magisk/utils/Shell.java
@@ -1,6 +1,5 @@
 package com.topjohnwu.magisk.utils;
 
-import android.content.Context;
 import android.text.TextUtils;
 
 import com.topjohnwu.magisk.MagiskManager;
@@ -10,7 +9,6 @@ import java.io.IOException;
 import java.io.InputStream;
 import java.io.InputStreamReader;
 import java.io.OutputStream;
-import java.lang.ref.WeakReference;
 import java.util.ArrayList;
 import java.util.Collection;
 import java.util.List;
@@ -21,8 +19,6 @@ import java.util.List;
 
 public class Shell {
 
-    private static WeakReference<MagiskManager> weakMm;
-
     // -1 = no shell; 0 = non root shell; 1 = root shell
     public static int status;
 
@@ -47,12 +43,8 @@ public class Shell {
         STDOUT = process.getInputStream();
     }
 
-    public static void registerShell(Context context) {
-        weakMm = new WeakReference<>(Utils.getMagiskManager(context));
-    }
-
     public static Shell getShell() {
-        MagiskManager mm = weakMm.get();
+        MagiskManager mm = MagiskManager.get();
         boolean needNewShell = mm.shell == null;
 
         if (!needNewShell) {
diff --git a/app/src/main/java/com/topjohnwu/magisk/utils/ShowUI.java b/app/src/main/java/com/topjohnwu/magisk/utils/ShowUI.java
index a84b72b24..89f9b1576 100644
--- a/app/src/main/java/com/topjohnwu/magisk/utils/ShowUI.java
+++ b/app/src/main/java/com/topjohnwu/magisk/utils/ShowUI.java
@@ -34,7 +34,8 @@ public class ShowUI {
     private static final int MAGISK_UPDATE_NOTIFICATION_ID = 1;
     private static final int APK_UPDATE_NOTIFICATION_ID = 2;
 
-    public static void showMagiskUpdateNotification(MagiskManager mm) {
+    public static void showMagiskUpdateNotification() {
+        MagiskManager mm = MagiskManager.get();
         NotificationCompat.Builder builder = new NotificationCompat.Builder(mm, MagiskManager.NOTIFICATION_CHANNEL);
         builder.setSmallIcon(R.drawable.ic_magisk)
                 .setContentTitle(mm.getString(R.string.magisk_update_title))
@@ -54,7 +55,8 @@ public class ShowUI {
         notificationManager.notify(MAGISK_UPDATE_NOTIFICATION_ID, builder.build());
     }
 
-    public static void showManagerUpdateNotification(MagiskManager mm) {
+    public static void showManagerUpdateNotification() {
+        MagiskManager mm = MagiskManager.get();
         NotificationCompat.Builder builder = new NotificationCompat.Builder(mm, MagiskManager.NOTIFICATION_CHANNEL);
         builder.setSmallIcon(R.drawable.ic_magisk)
                 .setContentTitle(mm.getString(R.string.manager_update_title))
@@ -73,7 +75,7 @@ public class ShowUI {
     }
 
     public static void showMagiskInstallDialog(MagiskFragment fragment, boolean enc, boolean verity) {
-        MagiskManager mm = Utils.getMagiskManager(fragment.getActivity());
+        MagiskManager mm = Utils.getMagiskManager(fragment.getContext());
         String filename = Utils.getLegalFilename("Magisk-v" + mm.remoteMagiskVersionString + ".zip");
         new AlertDialogBuilder(fragment.getActivity())
             .setTitle(mm.getString(R.string.repo_install_title, mm.getString(R.string.magisk)))
@@ -101,10 +103,10 @@ public class ShowUI {
                             switch (idx) {
                                 case 1:
                                     if (mm.remoteMagiskVersionCode < 1400) {
-                                        mm.toast(R.string.no_boot_file_patch_support, Toast.LENGTH_LONG);
+                                        MagiskManager.toast(R.string.no_boot_file_patch_support, Toast.LENGTH_LONG);
                                         return;
                                     }
-                                    mm.toast(R.string.boot_file_patch_msg, Toast.LENGTH_LONG);
+                                    MagiskManager.toast(R.string.boot_file_patch_msg, Toast.LENGTH_LONG);
                                     Intent intent = new Intent(Intent.ACTION_GET_CONTENT);
                                     intent.setType("*/*");
                                     fragment.startActivityForResult(intent, SELECT_BOOT_IMG,
@@ -256,7 +258,7 @@ public class ShowUI {
                             "cat " + uninstaller + " > /cache/" + UNINSTALLER,
                             "cat " + utils + " > /data/magisk/" + Utils.UTIL_FUNCTIONS
                     );
-                    mm.toast(R.string.uninstall_toast, Toast.LENGTH_LONG);
+                    MagiskManager.toast(R.string.uninstall_toast, Toast.LENGTH_LONG);
                     Shell.su_raw(
                             "sleep 5",
                             "pm uninstall " + mm.getApplicationInfo().packageName
@@ -268,7 +270,7 @@ public class ShowUI {
             .setNeutralButton(R.string.restore_stock_boot, (d, i) -> {
                 String boot = fragment.getSelectedBootImage();
                 if (boot == null) return;
-                new RestoreStockBoot(mm, boot).exec();
+                new RestoreStockBoot(boot).exec();
             })
             .setNegativeButton(R.string.no_thanks, null)
             .show();
diff --git a/app/src/main/java/com/topjohnwu/magisk/utils/Utils.java b/app/src/main/java/com/topjohnwu/magisk/utils/Utils.java
index 48f37390a..52c6b641b 100644
--- a/app/src/main/java/com/topjohnwu/magisk/utils/Utils.java
+++ b/app/src/main/java/com/topjohnwu/magisk/utils/Utils.java
@@ -143,41 +143,43 @@ public class Utils {
                 .setAction(R.string.ok, (v)->{}).show();
     }
 
-    public static boolean checkNetworkStatus(Context context) {
-        ConnectivityManager manager = (ConnectivityManager) context.getSystemService(Context.CONNECTIVITY_SERVICE);
+    public static boolean checkNetworkStatus() {
+        ConnectivityManager manager = (ConnectivityManager)
+                MagiskManager.get().getSystemService(Context.CONNECTIVITY_SERVICE);
         NetworkInfo networkInfo = manager.getActiveNetworkInfo();
         return networkInfo != null && networkInfo.isConnected();
     }
 
-    public static String getLocaleString(Context context, Locale locale, @StringRes int id) {
+    public static String getLocaleString(Locale locale, @StringRes int id) {
+        Context context = MagiskManager.get();
         Configuration config = context.getResources().getConfiguration();
         config.setLocale(locale);
         Context localizedContext = context.createConfigurationContext(config);
         return localizedContext.getString(id);
     }
 
-    public static List<Locale> getAvailableLocale(Context context) {
+    public static List<Locale> getAvailableLocale() {
         List<Locale> locales = new ArrayList<>();
         HashSet<String> set = new HashSet<>();
         Locale locale;
 
-        int compareId = R.string.download_file_error;
+        @StringRes int compareId = R.string.download_file_error;
 
         // Add default locale
         locales.add(Locale.ENGLISH);
-        set.add(getLocaleString(context, Locale.ENGLISH, compareId));
+        set.add(getLocaleString(Locale.ENGLISH, compareId));
 
         // Add some special locales
         locales.add(Locale.TAIWAN);
-        set.add(getLocaleString(context, Locale.TAIWAN, compareId));
+        set.add(getLocaleString(Locale.TAIWAN, compareId));
         locale = new Locale("pt", "BR");
         locales.add(locale);
-        set.add(getLocaleString(context, locale, compareId));
+        set.add(getLocaleString(locale, compareId));
 
         // Other locales
-        for (String s : context.getAssets().getLocales()) {
+        for (String s : MagiskManager.get().getAssets().getLocales()) {
             locale = Locale.forLanguageTag(s);
-            if (set.add(getLocaleString(context, locale, compareId))) {
+            if (set.add(getLocaleString(locale, compareId))) {
                 locales.add(locale);
             }
         }
@@ -206,7 +208,8 @@ public class Utils {
                 == DevicePolicyManager.ENCRYPTION_STATUS_ACTIVE_PER_USER;
     }
 
-    public static Context getEncContext(Context context) {
+    public static Context getEncContext() {
+        Context context = MagiskManager.get();
         if (useFDE(context))
             return context.createDeviceProtectedStorageContext();
         else