diff --git a/app/src/main/java/org/schabi/newpipe/BaseFragment.java b/app/src/main/java/org/schabi/newpipe/BaseFragment.java
index c8b6969c6..0be427648 100644
--- a/app/src/main/java/org/schabi/newpipe/BaseFragment.java
+++ b/app/src/main/java/org/schabi/newpipe/BaseFragment.java
@@ -16,7 +16,7 @@ import leakcanary.AppWatcher;
 
 public abstract class BaseFragment extends Fragment {
     protected final String TAG = getClass().getSimpleName() + "@" + Integer.toHexString(hashCode());
-    protected final boolean DEBUG = MainActivity.DEBUG;
+    protected static final boolean DEBUG = MainActivity.DEBUG;
     protected AppCompatActivity activity;
     //These values are used for controlling fragments when they are part of the frontpage
     @State
diff --git a/app/src/main/java/org/schabi/newpipe/error/ReCaptchaActivity.java b/app/src/main/java/org/schabi/newpipe/error/ReCaptchaActivity.java
index cd6a882ae..555dd709b 100644
--- a/app/src/main/java/org/schabi/newpipe/error/ReCaptchaActivity.java
+++ b/app/src/main/java/org/schabi/newpipe/error/ReCaptchaActivity.java
@@ -1,5 +1,6 @@
 package org.schabi.newpipe.error;
 
+import android.annotation.SuppressLint;
 import android.content.Intent;
 import android.content.SharedPreferences;
 import android.os.Build;
@@ -66,6 +67,7 @@ public class ReCaptchaActivity extends AppCompatActivity {
     private ActivityRecaptchaBinding recaptchaBinding;
     private String foundCookies = "";
 
+    @SuppressLint("SetJavaScriptEnabled")
     @Override
     protected void onCreate(final Bundle savedInstanceState) {
         ThemeHelper.setTheme(this);
diff --git a/app/src/main/java/org/schabi/newpipe/player/Player.java b/app/src/main/java/org/schabi/newpipe/player/Player.java
index dd5468f69..771e935fe 100644
--- a/app/src/main/java/org/schabi/newpipe/player/Player.java
+++ b/app/src/main/java/org/schabi/newpipe/player/Player.java
@@ -614,7 +614,7 @@ public final class Player implements
             playQueue.append(newQueue.getStreams());
 
             if ((intent.getBooleanExtra(SELECT_ON_APPEND, false)
-                    || currentState == STATE_COMPLETED) && newQueue.getStreams().size() > 0) {
+                    || currentState == STATE_COMPLETED) && !newQueue.getStreams().isEmpty()) {
                 playQueue.setIndex(sizeBeforeAppend);
             }
 
@@ -2326,7 +2326,7 @@ public final class Player implements
             Log.d(TAG, "ExoPlayer - onRepeatModeChanged() called with: "
                     + "repeatMode = [" + repeatMode + "]");
         }
-        setRepeatModeButton(((AppCompatImageButton) binding.repeatButton), repeatMode);
+        setRepeatModeButton(binding.repeatButton, repeatMode);
         onShuffleOrRepeatModeChanged();
     }
 
@@ -3189,7 +3189,7 @@ public final class Player implements
     private StreamSegmentAdapter.StreamSegmentListener getStreamSegmentListener() {
         return (item, seconds) -> {
             segmentAdapter.selectSegment(item);
-            seekTo(seconds * 1000);
+            seekTo(seconds * 1000L);
             triggerProgressUpdate();
         };
     }
@@ -3199,7 +3199,7 @@ public final class Player implements
         final List<StreamSegment> segments = currentMetadata.getMetadata().getStreamSegments();
 
         for (int i = 0; i < segments.size(); i++) {
-            if (segments.get(i).getStartTimeSeconds() * 1000 > playbackPosition) {
+            if (segments.get(i).getStartTimeSeconds() * 1000L > playbackPosition) {
                 break;
             }
             nearestPosition++;
diff --git a/app/src/main/java/org/schabi/newpipe/util/NavigationHelper.java b/app/src/main/java/org/schabi/newpipe/util/NavigationHelper.java
index eba24020f..775848277 100644
--- a/app/src/main/java/org/schabi/newpipe/util/NavigationHelper.java
+++ b/app/src/main/java/org/schabi/newpipe/util/NavigationHelper.java
@@ -360,7 +360,7 @@ public final class NavigationHelper {
             autoPlay = false;
         }
 
-        final RunnableWithVideoDetailFragment onVideoDetailFragmentReady = (detailFragment) -> {
+        final RunnableWithVideoDetailFragment onVideoDetailFragmentReady = detailFragment -> {
             expandMainPlayer(detailFragment.requireActivity());
             detailFragment.setAutoPlay(autoPlay);
             if (switchingPlayers) {
diff --git a/app/src/main/java/org/schabi/newpipe/util/PermissionHelper.java b/app/src/main/java/org/schabi/newpipe/util/PermissionHelper.java
index c64631b72..160eb59cd 100644
--- a/app/src/main/java/org/schabi/newpipe/util/PermissionHelper.java
+++ b/app/src/main/java/org/schabi/newpipe/util/PermissionHelper.java
@@ -119,7 +119,7 @@ public final class PermissionHelper {
 
     public static boolean isPopupEnabled(final Context context) {
         return Build.VERSION.SDK_INT < Build.VERSION_CODES.M
-                || PermissionHelper.checkSystemAlertWindowPermission(context);
+                || checkSystemAlertWindowPermission(context);
     }
 
     public static void showPopupEnablementToast(final Context context) {
diff --git a/app/src/main/java/org/schabi/newpipe/util/external_communication/InternalUrlsHandler.java b/app/src/main/java/org/schabi/newpipe/util/external_communication/InternalUrlsHandler.java
index 104642d36..240341ab0 100644
--- a/app/src/main/java/org/schabi/newpipe/util/external_communication/InternalUrlsHandler.java
+++ b/app/src/main/java/org/schabi/newpipe/util/external_communication/InternalUrlsHandler.java
@@ -101,7 +101,12 @@ public final class InternalUrlsHandler {
             return false;
         }
         final String matchedUrl = matcher.group(1);
-        final int seconds = Integer.parseInt(matcher.group(2));
+        final int seconds;
+        if (matcher.group(2) == null) {
+            seconds = -1;
+        } else {
+            seconds = Integer.parseInt(matcher.group(2));
+        }
 
         final StreamingService service;
         final StreamingService.LinkType linkType;
@@ -154,7 +159,7 @@ public final class InternalUrlsHandler {
                 .observeOn(AndroidSchedulers.mainThread())
                 .subscribe(info -> {
                     final PlayQueue playQueue
-                            = new SinglePlayQueue(info, seconds * 1000);
+                            = new SinglePlayQueue(info, seconds * 1000L);
                     NavigationHelper.playOnPopupPlayer(context, playQueue, false);
                 }, throwable -> {
                     if (DEBUG) {