diff --git a/java/src/org/openqa/selenium/Proxy.java b/java/src/org/openqa/selenium/Proxy.java
index 345256444c4a0..e85a0d39eed52 100644
--- a/java/src/org/openqa/selenium/Proxy.java
+++ b/java/src/org/openqa/selenium/Proxy.java
@@ -26,6 +26,8 @@
 import java.util.Optional;
 import java.util.function.Consumer;
 import java.util.stream.Collectors;
+import org.jspecify.annotations.NullMarked;
+import org.jspecify.annotations.Nullable;
 
 /**
  * Configuration parameters for using proxies in WebDriver. Generally you should pass an object of
@@ -34,6 +36,7 @@
  * configuration. That is, it is an error to set an <code>httpProxy</code> manually and then turn on
  * proxy autodetect.
  */
+@NullMarked
 public class Proxy {
 
   public enum ProxyType {
@@ -77,15 +80,15 @@ public String toString() {
 
   private ProxyType proxyType = ProxyType.UNSPECIFIED;
   private boolean autodetect = false;
-  private String ftpProxy;
-  private String httpProxy;
-  private String noProxy;
-  private String sslProxy;
-  private String socksProxy;
-  private Integer socksVersion;
-  private String socksUsername;
-  private String socksPassword;
-  private String proxyAutoconfigUrl;
+  private @Nullable String ftpProxy;
+  private @Nullable String httpProxy;
+  private @Nullable String noProxy;
+  private @Nullable String sslProxy;
+  private @Nullable String socksProxy;
+  private @Nullable Integer socksVersion;
+  private @Nullable String socksUsername;
+  private @Nullable String socksPassword;
+  private @Nullable String proxyAutoconfigUrl;
 
   public Proxy() {
     // Empty default constructor
@@ -120,7 +123,7 @@ public Proxy(Map<String, ?> raw) {
     setters.put(AUTODETECT, value -> setAutodetect((Boolean) value));
     raw.forEach(
         (key, value) -> {
-          if (key != null && value != null) {
+          if (key != null && value != null && setters.containsKey(key)) {
             setters.get(key).accept(value);
           }
         });
@@ -223,7 +226,7 @@ public Proxy setAutodetect(boolean autodetect) {
    *
    * @return the FTP proxy hostname if present, or null if not set
    */
-  public String getFtpProxy() {
+  public @Nullable String getFtpProxy() {
     return ftpProxy;
   }
 
@@ -245,7 +248,7 @@ public Proxy setFtpProxy(String ftpProxy) {
    *
    * @return the HTTP proxy hostname if present, or null if not set
    */
-  public String getHttpProxy() {
+  public @Nullable String getHttpProxy() {
     return httpProxy;
   }
 
@@ -267,7 +270,7 @@ public Proxy setHttpProxy(String httpProxy) {
    *
    * @return The proxy bypass (noproxy) addresses
    */
-  public String getNoProxy() {
+  public @Nullable String getNoProxy() {
     return noProxy;
   }
 
@@ -289,7 +292,7 @@ public Proxy setNoProxy(String noProxy) {
    *
    * @return the SSL tunnel proxy hostname if present, null otherwise
    */
-  public String getSslProxy() {
+  public @Nullable String getSslProxy() {
     return sslProxy;
   }
 
@@ -311,7 +314,7 @@ public Proxy setSslProxy(String sslProxy) {
    *
    * @return the SOCKS proxy if present, null otherwise
    */
-  public String getSocksProxy() {
+  public @Nullable String getSocksProxy() {
     return socksProxy;
   }
 
@@ -333,7 +336,7 @@ public Proxy setSocksProxy(String socksProxy) {
    *
    * @return the SOCKS version if present, null otherwise
    */
-  public Integer getSocksVersion() {
+  public @Nullable Integer getSocksVersion() {
     return socksVersion;
   }
 
@@ -355,7 +358,7 @@ public Proxy setSocksVersion(Integer socksVersion) {
    *
    * @return the SOCKS proxy's username
    */
-  public String getSocksUsername() {
+  public @Nullable String getSocksUsername() {
     return socksUsername;
   }
 
@@ -377,7 +380,7 @@ public Proxy setSocksUsername(String username) {
    *
    * @return the SOCKS proxy's password
    */
-  public String getSocksPassword() {
+  public @Nullable String getSocksPassword() {
     return socksPassword;
   }
 
@@ -399,7 +402,7 @@ public Proxy setSocksPassword(String password) {
    *
    * @return the proxy auto-configuration URL
    */
-  public String getProxyAutoconfigUrl() {
+  public @Nullable String getProxyAutoconfigUrl() {
     return proxyAutoconfigUrl;
   }
 
@@ -428,7 +431,7 @@ private void verifyProxyTypeCompatibility(ProxyType compatibleProxy) {
   }
 
   @SuppressWarnings({"unchecked"})
-  public static Proxy extractFrom(Capabilities capabilities) {
+  public static @Nullable Proxy extractFrom(Capabilities capabilities) {
     Object rawProxy = capabilities.getCapability("proxy");
     Proxy proxy = null;
     if (rawProxy != null) {
@@ -472,7 +475,7 @@ public String toString() {
   }
 
   @Override
-  public boolean equals(Object o) {
+  public boolean equals(@Nullable Object o) {
     if (this == o) {
       return true;
     }
diff --git a/java/src/org/openqa/selenium/print/PageMargin.java b/java/src/org/openqa/selenium/print/PageMargin.java
index 46c2fb1bcef2d..cf4dc68e0ae95 100644
--- a/java/src/org/openqa/selenium/print/PageMargin.java
+++ b/java/src/org/openqa/selenium/print/PageMargin.java
@@ -19,7 +19,9 @@
 
 import java.util.HashMap;
 import java.util.Map;
+import org.jspecify.annotations.NullMarked;
 
+@NullMarked
 public class PageMargin {
   private final double top;
   private final double bottom;
diff --git a/java/src/org/openqa/selenium/print/PageSize.java b/java/src/org/openqa/selenium/print/PageSize.java
index c9c3d78908b12..664a336ff1edc 100644
--- a/java/src/org/openqa/selenium/print/PageSize.java
+++ b/java/src/org/openqa/selenium/print/PageSize.java
@@ -19,7 +19,9 @@
 
 import java.util.HashMap;
 import java.util.Map;
+import org.jspecify.annotations.NullMarked;
 
+@NullMarked
 public class PageSize {
 
   private final double height;
diff --git a/java/src/org/openqa/selenium/print/PrintOptions.java b/java/src/org/openqa/selenium/print/PrintOptions.java
index 16592a8bec1d3..8e0484f24ecd3 100644
--- a/java/src/org/openqa/selenium/print/PrintOptions.java
+++ b/java/src/org/openqa/selenium/print/PrintOptions.java
@@ -20,8 +20,11 @@
 import java.util.HashMap;
 import java.util.List;
 import java.util.Map;
+import org.jspecify.annotations.NullMarked;
+import org.jspecify.annotations.Nullable;
 import org.openqa.selenium.internal.Require;
 
+@NullMarked
 public class PrintOptions {
 
   public enum Orientation {
@@ -46,7 +49,7 @@ public String toString() {
   private boolean shrinkToFit = true;
   private PageSize pageSize = new PageSize();
   private PageMargin pageMargin = new PageMargin();
-  private String[] pageRanges;
+  private String @Nullable [] pageRanges;
 
   public Orientation getOrientation() {
     return this.orientation;
@@ -56,7 +59,7 @@ public void setOrientation(Orientation orientation) {
     this.orientation = Require.nonNull("orientation", orientation);
   }
 
-  public String[] getPageRanges() {
+  public String @Nullable [] getPageRanges() {
     return this.pageRanges;
   }