diff --git a/app/src/main/java/eu/kanade/tachiyomi/App.kt b/app/src/main/java/eu/kanade/tachiyomi/App.kt
index 74ced7ff0..acb62da13 100644
--- a/app/src/main/java/eu/kanade/tachiyomi/App.kt
+++ b/app/src/main/java/eu/kanade/tachiyomi/App.kt
@@ -99,7 +99,7 @@ open class App : Application(), DefaultLifecycleObserver, ImageLoaderFactory {
                             this@App,
                             0,
                             Intent(ACTION_DISABLE_INCOGNITO_MODE),
-                            PendingIntent.FLAG_ONE_SHOT,
+                            PendingIntent.FLAG_ONE_SHOT or PendingIntent.FLAG_IMMUTABLE,
                         )
                         setContentIntent(pendingIntent)
                     }
diff --git a/app/src/main/java/eu/kanade/tachiyomi/data/library/LibraryUpdateNotifier.kt b/app/src/main/java/eu/kanade/tachiyomi/data/library/LibraryUpdateNotifier.kt
index b85533267..0fe4733c2 100644
--- a/app/src/main/java/eu/kanade/tachiyomi/data/library/LibraryUpdateNotifier.kt
+++ b/app/src/main/java/eu/kanade/tachiyomi/data/library/LibraryUpdateNotifier.kt
@@ -339,7 +339,7 @@ class LibraryUpdateNotifier(private val context: Context) {
             flags = Intent.FLAG_ACTIVITY_CLEAR_TOP or Intent.FLAG_ACTIVITY_SINGLE_TOP
             action = MainActivity.SHORTCUT_RECENTLY_UPDATED
         }
-        return PendingIntent.getActivity(context, 0, intent, PendingIntent.FLAG_UPDATE_CURRENT)
+        return PendingIntent.getActivity(context, 0, intent, PendingIntent.FLAG_UPDATE_CURRENT or PendingIntent.FLAG_IMMUTABLE)
     }
 
     companion object {
diff --git a/app/src/main/java/eu/kanade/tachiyomi/data/notification/NotificationReceiver.kt b/app/src/main/java/eu/kanade/tachiyomi/data/notification/NotificationReceiver.kt
index 594325527..47039a174 100644
--- a/app/src/main/java/eu/kanade/tachiyomi/data/notification/NotificationReceiver.kt
+++ b/app/src/main/java/eu/kanade/tachiyomi/data/notification/NotificationReceiver.kt
@@ -307,7 +307,7 @@ class NotificationReceiver : BroadcastReceiver() {
             val intent = Intent(context, NotificationReceiver::class.java).apply {
                 action = ACTION_RESUME_DOWNLOADS
             }
-            return PendingIntent.getBroadcast(context, 0, intent, PendingIntent.FLAG_UPDATE_CURRENT)
+            return PendingIntent.getBroadcast(context, 0, intent, PendingIntent.FLAG_UPDATE_CURRENT or PendingIntent.FLAG_IMMUTABLE)
         }
 
         /**
@@ -320,7 +320,7 @@ class NotificationReceiver : BroadcastReceiver() {
             val intent = Intent(context, NotificationReceiver::class.java).apply {
                 action = ACTION_PAUSE_DOWNLOADS
             }
-            return PendingIntent.getBroadcast(context, 0, intent, PendingIntent.FLAG_UPDATE_CURRENT)
+            return PendingIntent.getBroadcast(context, 0, intent, PendingIntent.FLAG_UPDATE_CURRENT or PendingIntent.FLAG_IMMUTABLE)
         }
 
         /**
@@ -333,7 +333,7 @@ class NotificationReceiver : BroadcastReceiver() {
             val intent = Intent(context, NotificationReceiver::class.java).apply {
                 action = ACTION_CLEAR_DOWNLOADS
             }
-            return PendingIntent.getBroadcast(context, 0, intent, PendingIntent.FLAG_UPDATE_CURRENT)
+            return PendingIntent.getBroadcast(context, 0, intent, PendingIntent.FLAG_UPDATE_CURRENT or PendingIntent.FLAG_IMMUTABLE)
         }
 
         /**
@@ -348,7 +348,7 @@ class NotificationReceiver : BroadcastReceiver() {
                 action = ACTION_DISMISS_NOTIFICATION
                 putExtra(EXTRA_NOTIFICATION_ID, notificationId)
             }
-            return PendingIntent.getBroadcast(context, 0, intent, PendingIntent.FLAG_UPDATE_CURRENT)
+            return PendingIntent.getBroadcast(context, 0, intent, PendingIntent.FLAG_UPDATE_CURRENT or PendingIntent.FLAG_IMMUTABLE)
         }
 
         /**
@@ -403,7 +403,7 @@ class NotificationReceiver : BroadcastReceiver() {
                 putExtra(EXTRA_FILE_LOCATION, path)
                 putExtra(EXTRA_NOTIFICATION_ID, notificationId)
             }
-            return PendingIntent.getBroadcast(context, 0, intent, PendingIntent.FLAG_UPDATE_CURRENT)
+            return PendingIntent.getBroadcast(context, 0, intent, PendingIntent.FLAG_UPDATE_CURRENT or PendingIntent.FLAG_IMMUTABLE)
         }
 
         /**
@@ -420,7 +420,7 @@ class NotificationReceiver : BroadcastReceiver() {
                 putExtra(EXTRA_FILE_LOCATION, path)
                 putExtra(EXTRA_NOTIFICATION_ID, notificationId)
             }
-            return PendingIntent.getBroadcast(context, 0, intent, PendingIntent.FLAG_UPDATE_CURRENT)
+            return PendingIntent.getBroadcast(context, 0, intent, PendingIntent.FLAG_UPDATE_CURRENT or PendingIntent.FLAG_IMMUTABLE)
         }
 
         /**
@@ -432,7 +432,7 @@ class NotificationReceiver : BroadcastReceiver() {
          */
         internal fun openChapterPendingActivity(context: Context, manga: Manga, chapter: Chapter): PendingIntent {
             val newIntent = ReaderActivity.newIntent(context, manga, chapter)
-            return PendingIntent.getActivity(context, manga.id.hashCode(), newIntent, PendingIntent.FLAG_UPDATE_CURRENT)
+            return PendingIntent.getActivity(context, manga.id.hashCode(), newIntent, PendingIntent.FLAG_UPDATE_CURRENT or PendingIntent.FLAG_IMMUTABLE)
         }
 
         /**
@@ -448,7 +448,7 @@ class NotificationReceiver : BroadcastReceiver() {
                     .putExtra(MangaController.MANGA_EXTRA, manga.id)
                     .putExtra("notificationId", manga.id.hashCode())
                     .putExtra("groupId", groupId)
-            return PendingIntent.getActivity(context, manga.id.hashCode(), newIntent, PendingIntent.FLAG_UPDATE_CURRENT)
+            return PendingIntent.getActivity(context, manga.id.hashCode(), newIntent, PendingIntent.FLAG_UPDATE_CURRENT or PendingIntent.FLAG_IMMUTABLE)
         }
 
         /**
@@ -470,7 +470,7 @@ class NotificationReceiver : BroadcastReceiver() {
                 putExtra(EXTRA_NOTIFICATION_ID, manga.id.hashCode())
                 putExtra(EXTRA_GROUP_ID, groupId)
             }
-            return PendingIntent.getBroadcast(context, manga.id.hashCode(), newIntent, PendingIntent.FLAG_UPDATE_CURRENT)
+            return PendingIntent.getBroadcast(context, manga.id.hashCode(), newIntent, PendingIntent.FLAG_UPDATE_CURRENT or PendingIntent.FLAG_IMMUTABLE)
         }
 
         /**
@@ -492,7 +492,7 @@ class NotificationReceiver : BroadcastReceiver() {
                 putExtra(EXTRA_NOTIFICATION_ID, manga.id.hashCode())
                 putExtra(EXTRA_GROUP_ID, groupId)
             }
-            return PendingIntent.getBroadcast(context, manga.id.hashCode(), newIntent, PendingIntent.FLAG_UPDATE_CURRENT)
+            return PendingIntent.getBroadcast(context, manga.id.hashCode(), newIntent, PendingIntent.FLAG_UPDATE_CURRENT or PendingIntent.FLAG_IMMUTABLE)
         }
 
         /**
@@ -505,7 +505,7 @@ class NotificationReceiver : BroadcastReceiver() {
             val intent = Intent(context, NotificationReceiver::class.java).apply {
                 action = ACTION_CANCEL_LIBRARY_UPDATE
             }
-            return PendingIntent.getBroadcast(context, 0, intent, PendingIntent.FLAG_UPDATE_CURRENT)
+            return PendingIntent.getBroadcast(context, 0, intent, PendingIntent.FLAG_UPDATE_CURRENT or PendingIntent.FLAG_IMMUTABLE)
         }
 
         /**
@@ -519,7 +519,7 @@ class NotificationReceiver : BroadcastReceiver() {
                 action = MainActivity.SHORTCUT_EXTENSIONS
                 addFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP)
             }
-            return PendingIntent.getActivity(context, 0, intent, PendingIntent.FLAG_UPDATE_CURRENT)
+            return PendingIntent.getActivity(context, 0, intent, PendingIntent.FLAG_UPDATE_CURRENT or PendingIntent.FLAG_IMMUTABLE)
         }
 
         /**
@@ -536,7 +536,7 @@ class NotificationReceiver : BroadcastReceiver() {
                 putExtra(EXTRA_URI, uri)
                 putExtra(EXTRA_NOTIFICATION_ID, notificationId)
             }
-            return PendingIntent.getBroadcast(context, 0, intent, PendingIntent.FLAG_UPDATE_CURRENT)
+            return PendingIntent.getBroadcast(context, 0, intent, PendingIntent.FLAG_UPDATE_CURRENT or PendingIntent.FLAG_IMMUTABLE)
         }
 
         /**
@@ -552,7 +552,7 @@ class NotificationReceiver : BroadcastReceiver() {
                 setDataAndType(uri, "text/plain")
                 flags = Intent.FLAG_ACTIVITY_NEW_TASK or Intent.FLAG_GRANT_READ_URI_PERMISSION
             }
-            return PendingIntent.getActivity(context, 0, intent, 0)
+            return PendingIntent.getActivity(context, 0, intent, PendingIntent.FLAG_IMMUTABLE)
         }
 
         /**
@@ -569,7 +569,7 @@ class NotificationReceiver : BroadcastReceiver() {
                 putExtra(EXTRA_URI, uri)
                 putExtra(EXTRA_NOTIFICATION_ID, notificationId)
             }
-            return PendingIntent.getBroadcast(context, 0, intent, PendingIntent.FLAG_UPDATE_CURRENT)
+            return PendingIntent.getBroadcast(context, 0, intent, PendingIntent.FLAG_UPDATE_CURRENT or PendingIntent.FLAG_IMMUTABLE)
         }
 
         /**
@@ -584,7 +584,7 @@ class NotificationReceiver : BroadcastReceiver() {
                 action = ACTION_CANCEL_RESTORE
                 putExtra(EXTRA_NOTIFICATION_ID, notificationId)
             }
-            return PendingIntent.getBroadcast(context, 0, intent, PendingIntent.FLAG_UPDATE_CURRENT)
+            return PendingIntent.getBroadcast(context, 0, intent, PendingIntent.FLAG_UPDATE_CURRENT or PendingIntent.FLAG_IMMUTABLE)
         }
     }
 }
diff --git a/app/src/main/java/eu/kanade/tachiyomi/data/updater/AppUpdateChecker.kt b/app/src/main/java/eu/kanade/tachiyomi/data/updater/AppUpdateChecker.kt
index 60460dc98..3688d302f 100644
--- a/app/src/main/java/eu/kanade/tachiyomi/data/updater/AppUpdateChecker.kt
+++ b/app/src/main/java/eu/kanade/tachiyomi/data/updater/AppUpdateChecker.kt
@@ -47,6 +47,7 @@ class AppUpdateChecker {
             when (result) {
                 is AppUpdateResult.NewUpdate -> AppUpdateNotifier(context).promptUpdate(result.release)
                 is AppUpdateResult.NewUpdateFdroidInstallation -> AppUpdateNotifier(context).promptFdroidUpdate()
+                else -> {}
             }
 
             result
@@ -56,7 +57,6 @@ class AppUpdateChecker {
     private fun isNewVersion(versionTag: String): Boolean {
         // Removes prefixes like "r" or "v"
         val newVersion = versionTag.replace("[^\\d.]".toRegex(), "")
-        val oldVersion = BuildConfig.VERSION_NAME.replace("[^\\d.]".toRegex(), "")
 
         return if (BuildConfig.PREVIEW) {
             // Preview builds: based on releases in "tachiyomiorg/tachiyomi-preview" repo
@@ -65,6 +65,8 @@ class AppUpdateChecker {
         } else {
             // Release builds: based on releases in "tachiyomiorg/tachiyomi" repo
             // tagged as something like "v0.1.2"
+            val oldVersion = BuildConfig.VERSION_NAME.replace("[^\\d.]".toRegex(), "")
+
             val newSemVer = newVersion.split(".").map { it.toInt() }
             val oldSemVer = oldVersion.split(".").map { it.toInt() }
 
@@ -73,6 +75,7 @@ class AppUpdateChecker {
                     return true
                 }
             }
+
             false
         }
     }
diff --git a/app/src/main/java/eu/kanade/tachiyomi/data/updater/AppUpdateNotifier.kt b/app/src/main/java/eu/kanade/tachiyomi/data/updater/AppUpdateNotifier.kt
index 8d13b8928..25b96cd02 100644
--- a/app/src/main/java/eu/kanade/tachiyomi/data/updater/AppUpdateNotifier.kt
+++ b/app/src/main/java/eu/kanade/tachiyomi/data/updater/AppUpdateNotifier.kt
@@ -1,5 +1,6 @@
 package eu.kanade.tachiyomi.data.updater
 
+import android.annotation.SuppressLint
 import android.app.PendingIntent
 import android.content.Context
 import android.content.Intent
@@ -26,12 +27,13 @@ internal class AppUpdateNotifier(private val context: Context) {
         context.notificationManager.notify(id, build())
     }
 
+    @SuppressLint("LaunchActivityFromNotification")
     fun promptUpdate(release: GithubRelease) {
         val intent = Intent(context, AppUpdateService::class.java).apply {
             putExtra(AppUpdateService.EXTRA_DOWNLOAD_URL, release.getDownloadLink())
             putExtra(AppUpdateService.EXTRA_DOWNLOAD_TITLE, release.version)
         }
-        val updateIntent = PendingIntent.getService(context, 0, intent, PendingIntent.FLAG_UPDATE_CURRENT)
+        val updateIntent = PendingIntent.getService(context, 0, intent, PendingIntent.FLAG_UPDATE_CURRENT or PendingIntent.FLAG_IMMUTABLE)
 
         val releaseIntent = Intent(Intent.ACTION_VIEW, release.releaseLink.toUri()).apply {
             flags = Intent.FLAG_ACTIVITY_NEW_TASK or Intent.FLAG_ACTIVITY_CLEAR_TOP
diff --git a/app/src/main/java/eu/kanade/tachiyomi/ui/manga/AddDuplicateMangaDialog.kt b/app/src/main/java/eu/kanade/tachiyomi/ui/manga/AddDuplicateMangaDialog.kt
index 5121f44cc..27a06b4fe 100644
--- a/app/src/main/java/eu/kanade/tachiyomi/ui/manga/AddDuplicateMangaDialog.kt
+++ b/app/src/main/java/eu/kanade/tachiyomi/ui/manga/AddDuplicateMangaDialog.kt
@@ -17,13 +17,17 @@ class AddDuplicateMangaDialog<T>(bundle: Bundle? = null) : DialogController(bund
     private val sourceManager: SourceManager by injectLazy()
 
     private lateinit var libraryManga: Manga
-    private lateinit var newManga: Manga
+    private lateinit var onAddToLibrary: () -> Unit
 
-    constructor(target: T, libraryManga: Manga, newManga: Manga) : this() {
+    constructor(
+        target: T,
+        libraryManga: Manga,
+        onAddToLibrary: () -> Unit,
+    ) : this() {
         targetController = target
 
         this.libraryManga = libraryManga
-        this.newManga = newManga
+        this.onAddToLibrary = onAddToLibrary
     }
 
     override fun onCreateDialog(savedViewState: Bundle?): Dialog {
@@ -32,7 +36,7 @@ class AddDuplicateMangaDialog<T>(bundle: Bundle? = null) : DialogController(bund
         return MaterialAlertDialogBuilder(activity!!)
             .setMessage(activity?.getString(R.string.confirm_manga_add_duplicate, source.name))
             .setPositiveButton(activity?.getString(R.string.action_add)) { _, _ ->
-                (targetController as? Listener)?.addToLibrary(newManga)
+                onAddToLibrary()
             }
             .setNegativeButton(android.R.string.cancel, null)
             .setNeutralButton(activity?.getString(R.string.action_show_manga)) { _, _ ->
diff --git a/app/src/main/java/eu/kanade/tachiyomi/ui/manga/MangaController.kt b/app/src/main/java/eu/kanade/tachiyomi/ui/manga/MangaController.kt
index e36f5a203..cd9bb9ec5 100644
--- a/app/src/main/java/eu/kanade/tachiyomi/ui/manga/MangaController.kt
+++ b/app/src/main/java/eu/kanade/tachiyomi/ui/manga/MangaController.kt
@@ -521,7 +521,8 @@ class MangaController :
         } else {
             val duplicateManga = presenter.getDuplicateLibraryManga(manga)
             if (duplicateManga != null) {
-                AddDuplicateMangaDialog(this, duplicateManga, manga).showDialog(router)
+                AddDuplicateMangaDialog(this, duplicateManga) { addToLibrary(manga) }
+                    .showDialog(router)
             } else {
                 addToLibrary(manga)
             }
diff --git a/app/src/main/java/eu/kanade/tachiyomi/util/system/WebViewUtil.kt b/app/src/main/java/eu/kanade/tachiyomi/util/system/WebViewUtil.kt
index af0b83041..7cc8f3fba 100644
--- a/app/src/main/java/eu/kanade/tachiyomi/util/system/WebViewUtil.kt
+++ b/app/src/main/java/eu/kanade/tachiyomi/util/system/WebViewUtil.kt
@@ -11,7 +11,7 @@ import logcat.LogPriority
 object WebViewUtil {
     const val SPOOF_PACKAGE_NAME = "org.chromium.chrome"
 
-    const val MINIMUM_WEBVIEW_VERSION = 98
+    const val MINIMUM_WEBVIEW_VERSION = 99
 
     fun supportsWebView(context: Context): Boolean {
         try {