Change UA to privacy.resistFingerprinting.

Author: FireMasterK

extractor/src/main/java/org/schabi/newpipe/extractor/services/youtube/extractors/YoutubeCommentsExtractor.java

@@ -33,7 +33,7 @@
 
 public class YoutubeCommentsExtractor extends CommentsExtractor {
     // using the mobile site for comments because it loads faster and uses get requests instead of post
-    private static final String USER_AGENT = "Mozilla/5.0 (Android 8.1.0; Mobile; rv:62.0) Gecko/62.0 Firefox/62.0";
+    private static final String USER_AGENT = "Mozilla/5.0 (Android 9; Mobile; rv:78.0) Gecko/20100101 Firefox/78.0";
     private static final Pattern YT_CLIENT_NAME_PATTERN = Pattern.compile("INNERTUBE_CONTEXT_CLIENT_NAME\\\":(.*?)[,}]");
 
     private String ytClientVersion;

extractor/src/test/java/org/schabi/newpipe/downloader/DownloaderTestImpl.java

@@ -19,9 +19,9 @@
 
 public final class DownloaderTestImpl extends Downloader {
     private static final String USER_AGENT
-            = "Mozilla/5.0 (Windows NT 10.0; WOW64; rv:68.0) Gecko/20100101 Firefox/68.0";
+            = "Mozilla/5.0 (Windows NT 10.0; rv:78.0) Gecko/20100101 Firefox/78.0";
     private static DownloaderTestImpl instance;
-    private OkHttpClient client;
+    private final OkHttpClient client;
 
     private DownloaderTestImpl(final OkHttpClient.Builder builder) {
         this.client = builder.readTimeout(30, TimeUnit.SECONDS).build();