diff --git a/modules/time-calc-app/pom.xml b/modules/time-calc-app/pom.xml
index a9c6b98..cd9e00d 100644
--- a/modules/time-calc-app/pom.xml
+++ b/modules/time-calc-app/pom.xml
@@ -72,6 +72,17 @@
             <artifactId>flatlaf</artifactId>
             <version>3.4.1</version>
         </dependency>
+
+        <dependency>
+            <groupId>org.openjfx</groupId>
+            <artifactId>javafx-controls</artifactId>
+            <version>21</version>
+        </dependency>
+        <dependency>
+            <groupId>org.openjfx</groupId>
+            <artifactId>javafx-web</artifactId>
+            <version>21</version>
+        </dependency>
     </dependencies>
 
 </project>
\ No newline at end of file
diff --git a/modules/time-calc-app/src/main/java/org/nanoboot/utils/timecalc/app/TimeCalcConfiguration.java b/modules/time-calc-app/src/main/java/org/nanoboot/utils/timecalc/app/TimeCalcConfiguration.java
index 0a241c8..2c92f8a 100644
--- a/modules/time-calc-app/src/main/java/org/nanoboot/utils/timecalc/app/TimeCalcConfiguration.java
+++ b/modules/time-calc-app/src/main/java/org/nanoboot/utils/timecalc/app/TimeCalcConfiguration.java
@@ -426,6 +426,12 @@ public class TimeCalcConfiguration {
         }
         return mapOfProperties.get(timeCalcProperty);
     }
+    public String getProperty(String key) {
+        return timeCalcProperties.getString(key);
+    }
+    public void setProperty(String key, String value) {
+        timeCalcProperties.setString(key, value);
+    }
 
     public String print() {
         StringBuilder sb = new StringBuilder();
diff --git a/modules/time-calc-app/src/main/java/org/nanoboot/utils/timecalc/app/TimeCalcProperties.java b/modules/time-calc-app/src/main/java/org/nanoboot/utils/timecalc/app/TimeCalcProperties.java
index 9df9c57..d10ae99 100644
--- a/modules/time-calc-app/src/main/java/org/nanoboot/utils/timecalc/app/TimeCalcProperties.java
+++ b/modules/time-calc-app/src/main/java/org/nanoboot/utils/timecalc/app/TimeCalcProperties.java
@@ -83,6 +83,14 @@ public class TimeCalcProperties {
                 getDefaultStringValue(timeCalcProperty)));
     }
 
+    public String getString(String key) {
+        return (String) properties.get(key);
+    }
+
+    public void setString(String key, String value) {
+        properties.put(key, value);
+    }
+
     private String getDefaultStringValue(TimeCalcProperty timeCalcProperty) {
         if (!defaultProperties
                 .containsKey(timeCalcProperty.getKey())) {
diff --git a/modules/time-calc-app/src/main/java/org/nanoboot/utils/timecalc/swing/common/Widget.java b/modules/time-calc-app/src/main/java/org/nanoboot/utils/timecalc/swing/common/Widget.java
index 4182638..592530f 100644
--- a/modules/time-calc-app/src/main/java/org/nanoboot/utils/timecalc/swing/common/Widget.java
+++ b/modules/time-calc-app/src/main/java/org/nanoboot/utils/timecalc/swing/common/Widget.java
@@ -101,7 +101,11 @@ public class Widget extends JPanel implements
     private WidgetMenu widgetMenu = null;
     public Widget() {
         setBackground(BACKGROUND_COLOR);
-        new Timer(getTimerDelay(), e -> repaint()).start();
+        int timerDelay = getTimerDelay();
+//        if(timerDelay > 10) {
+//            timerDelay = 10;
+//        }
+        new Timer(timerDelay, e -> repaint()).start();
         this.addMouseMotionListener(new MouseMotionListener() {
             @Override
             public void mouseDragged(MouseEvent e) {
@@ -208,7 +212,7 @@ public class Widget extends JPanel implements
     }
 
     public int getTimerDelay() {
-        return 100;
+        return 10;
     }
 
     //    @Override
diff --git a/modules/time-calc-app/src/main/java/org/nanoboot/utils/timecalc/swing/windows/MainWindow.java b/modules/time-calc-app/src/main/java/org/nanoboot/utils/timecalc/swing/windows/MainWindow.java
index 2fbb48c..472487e 100644
--- a/modules/time-calc-app/src/main/java/org/nanoboot/utils/timecalc/swing/windows/MainWindow.java
+++ b/modules/time-calc-app/src/main/java/org/nanoboot/utils/timecalc/swing/windows/MainWindow.java
@@ -104,7 +104,7 @@ public class MainWindow extends TWindow {
     private final TButton restartButton;
     private final TButton focusButton;
     private final TButton helpButton;
-    private final TButton weatherButton;
+    private final TButton webBrowserButton;
     private final TButton commandButton;
     private final TButton jokeButton;
     private final AboutButton aboutButton;
@@ -254,7 +254,7 @@ public class MainWindow extends TWindow {
         this.exitButton = new TButton("Exit");
         this.focusButton = new TButton(allowOnlyBasicFeaturesProperty.getValue() ? " " : "Focus");
         this.helpButton = new TButton("Help");
-        this.weatherButton = new TButton("Weather");
+        this.webBrowserButton = new TButton("Browse");
         this.commandButton = new TButton("Command");
         this.jokeButton = new TButton("Joke");
         this.aboutButton = new AboutButton();
@@ -360,7 +360,7 @@ public class MainWindow extends TWindow {
         add(walkingHumanProgress);
         walkingHumanProgress.visibleProperty
                 .bindTo(timeCalcConfiguration.walkingHumanVisibleProperty);
-        weatherButton
+        webBrowserButton
                 .setBounds(SwingUtils.MARGIN, walkingHumanProgress.getY()
                         + walkingHumanProgress.getHeight());
 
@@ -631,6 +631,7 @@ public class MainWindow extends TWindow {
             add(elapsedTextField);
             add(remainingTextFieldLabel);
             add(remainingTextField);
+            add(webBrowserButton);
         }
         if(!allowOnlyBasicFeaturesProperty.getValue()) {
             add(saveButton);
@@ -672,6 +673,7 @@ public class MainWindow extends TWindow {
         configButton.setBoundsFromTop(weekLabel);
         workDaysButton.setBoundsFromLeft(configButton);
         activitiesButton.setBoundsFromLeft(workDaysButton);
+        webBrowserButton.setBoundsFromLeft(activitiesButton);
 
         exitButton.setBounds(saveButton.getX() + saveButton.getWidth() - activitiesButton.getWidth(), workDaysButton.getY(), activitiesButton.getWidth(), activitiesButton.getHeight());
         restartButton.setBounds(exitButton.getX() - SwingUtils.MARGIN - activitiesButton.getWidth(), activitiesButton.getY(), activitiesButton.getWidth(), activitiesButton.getHeight());
@@ -694,8 +696,8 @@ public class MainWindow extends TWindow {
 
         setTitle(getWindowTitle());
 
-        weatherButton
-                .addActionListener(e -> new WeatherWindow().setVisible(true));
+        webBrowserButton
+                .addActionListener(e -> WebBrowser.show(timeCalcConfiguration));
         commandButton.addActionListener(
                 new CommandActionListener(timeCalcApp, timeCalcConfiguration));
 
diff --git a/modules/time-calc-app/src/main/java/org/nanoboot/utils/timecalc/swing/windows/WeatherWindow.java b/modules/time-calc-app/src/main/java/org/nanoboot/utils/timecalc/swing/windows/WeatherWindow.java
deleted file mode 100644
index c9e815c..0000000
--- a/modules/time-calc-app/src/main/java/org/nanoboot/utils/timecalc/swing/windows/WeatherWindow.java
+++ /dev/null
@@ -1,160 +0,0 @@
-package org.nanoboot.utils.timecalc.swing.windows;
-
-import org.nanoboot.utils.timecalc.utils.common.Utils;
-
-import javax.swing.JEditorPane;
-import javax.swing.JFrame;
-import javax.swing.JScrollPane;
-import javax.xml.transform.OutputKeys;
-import javax.xml.transform.Source;
-import javax.xml.transform.Transformer;
-import javax.xml.transform.TransformerFactory;
-import javax.xml.transform.stream.StreamResult;
-import javax.xml.transform.stream.StreamSource;
-import java.io.BufferedReader;
-import java.io.File;
-import java.io.IOException;
-import java.io.InputStreamReader;
-import java.io.StringReader;
-import java.io.StringWriter;
-import java.net.HttpURLConnection;
-import java.net.URL;
-
-/**
- * @author Robert Vokac
- * @since 16.02.2024
- */
-public class WeatherWindow extends JFrame {
-
-    public WeatherWindow() {
-        this.setSize(400, 300);
-
-        JEditorPane jep = new JEditorPane();
-        jep.setEditable(false);
-        JScrollPane scrollPane = new JScrollPane(jep);
-        scrollPane.setBounds(10, 10, 750, 550);
-        getContentPane().add(scrollPane);
-
-        //        File proxyTxt = new File("proxy.txt");
-        //        if (!proxyTxt.exists()) {
-        //            jep.setText("Sorry, file proxy.txt was not found.");
-        //            return;
-        //        }
-        //        final HttpProxy httpProxy;
-        //        try {
-        //            httpProxy = new HttpProxy(proxyTxt);
-        //        } catch (RuntimeException e) {
-        //            jep.setContentType("text/html");
-        //            jep.setText(e.getMessage());
-        //            return;
-        //        }
-        try {
-            String pocasiHtml = null;
-            File pocasiHtmlFile = new File("pocasi.html");
-            try {
-                pocasiHtml = downloadFile("https://pocasi.seznam.cz/praha");
-                pocasiHtml = prettyFormatXml(pocasiHtml, 4);
-                Utils.writeTextToFile(pocasiHtmlFile, pocasiHtml);
-            } catch (Exception e) {
-                e.printStackTrace();
-                pocasiHtml = pocasiHtmlFile.exists()
-                        ? Utils.readTextFromFile(pocasiHtmlFile)
-                        : "Sorry, pocasi.html was not found.";
-            }
-
-            {
-                StringBuilder sb = new StringBuilder();
-                boolean ogm_detailed_forecast_Started = false;
-                for (String line : pocasiHtml.split("\\r?\\n|\\r")) {
-
-                    if (line.contains("ogm-detailed-forecast")) {
-                        ogm_detailed_forecast_Started = true;
-                    }
-                    if (ogm_detailed_forecast_Started && line
-                            .contains("<button aria-label=")) {
-                        String l = line
-                                .trim()
-                                .replace("<button aria-label=\"", "")
-                                .split("class")[0];
-                        sb.append(l);
-                        sb.append("<br>\n\n");
-                        System.out.println("Found another line");
-                    }
-                }
-                pocasiHtml = sb.toString();
-            }
-
-            jep.setContentType("text/html");
-            jep.setText("<html><head><meta charset=\"UTF-8\"></head><body>"
-                    + pocasiHtml + "</body></html>");
-            Utils.writeTextToFile(new File("aaa"),
-                    "<html><head><meta charset=\"UTF-8\"></head><body>"
-                    + pocasiHtml + "</body></html>");
-        } catch (Exception e) {
-            e.printStackTrace();
-            jep.setContentType("text/html");
-            jep.setText("<html>Could not load " + e.getMessage() + "</html>");
-        }
-    }
-
-    private static String prettyFormatXml(final String input,
-            final int indent) {
-        try {
-            Source xmlInput = new StreamSource(new StringReader(input));
-            StringWriter stringWriter = new StringWriter();
-            StreamResult xmlOutput = new StreamResult(stringWriter);
-            TransformerFactory transformerFactory
-                    = TransformerFactory.newInstance();
-
-            transformerFactory.setAttribute("indent-number", indent);
-
-            Transformer transformer = transformerFactory.newTransformer();
-            transformer.setOutputProperty(OutputKeys.INDENT, "yes");
-            transformer.transform(xmlInput, xmlOutput);
-            return xmlOutput.getWriter().toString();
-        } catch (Throwable e) {
-            try {
-                Source xmlInput = new StreamSource(new StringReader(input));
-                StringWriter stringWriter = new StringWriter();
-                StreamResult xmlOutput = new StreamResult(stringWriter);
-                TransformerFactory transformerFactory
-                        = TransformerFactory.newInstance();
-                Transformer transformer = transformerFactory.newTransformer();
-                transformer.setOutputProperty(OutputKeys.INDENT, "yes");
-                transformer.setOutputProperty(
-                        "{http://xml.apache.org/xslt}indent-amount",
-                        String.valueOf(indent));
-                transformer.transform(xmlInput, xmlOutput);
-                return xmlOutput.getWriter().toString();
-            } catch (Throwable t) {
-                return input;
-            }
-        }
-    }
-
-    public String downloadFile(String urlString)
-            throws IOException {
-
-        URL url = new URL(urlString);
-        HttpURLConnection conn = (HttpURLConnection) url.openConnection();
-        conn.connect();
-        BufferedReader br = null;
-        StringBuilder sb = new StringBuilder();
-        if (conn.getResponseCode() == 200) {
-            br = new BufferedReader(
-                    new InputStreamReader(conn.getInputStream()));
-            String strCurrentLine;
-            while ((strCurrentLine = br.readLine()) != null) {
-                sb.append(strCurrentLine).append("\n");
-            }
-        } else {
-            br = new BufferedReader(
-                    new InputStreamReader(conn.getErrorStream()));
-            String strCurrentLine;
-            while ((strCurrentLine = br.readLine()) != null) {
-                sb.append(strCurrentLine).append("\n");
-            }
-        }
-        return sb.toString();
-    }
-}
diff --git a/modules/time-calc-app/src/main/java/org/nanoboot/utils/timecalc/swing/windows/WebBrowser.java b/modules/time-calc-app/src/main/java/org/nanoboot/utils/timecalc/swing/windows/WebBrowser.java
new file mode 100644
index 0000000..1a0353d
--- /dev/null
+++ b/modules/time-calc-app/src/main/java/org/nanoboot/utils/timecalc/swing/windows/WebBrowser.java
@@ -0,0 +1,192 @@
+package org.nanoboot.utils.timecalc.swing.windows;
+
+import javafx.application.Application;
+import javafx.application.Platform;
+import javafx.scene.Scene;
+import javafx.scene.control.ChoiceDialog;
+import javafx.scene.control.TextInputDialog;
+import javafx.scene.input.KeyCode;
+import javafx.scene.layout.VBox;
+import javafx.scene.web.WebEngine;
+import javafx.scene.web.WebView;
+import javafx.stage.Stage;
+import org.nanoboot.utils.timecalc.app.TimeCalcConfiguration;
+import org.nanoboot.utils.timecalc.utils.common.Utils;
+
+import java.util.ArrayList;
+import java.util.Collections;
+import java.util.HashMap;
+import java.util.List;
+import java.util.Map;
+import java.util.Optional;
+
+/**
+ * @author pc00289
+ * @since 26.04.2024
+ */
+public class WebBrowser extends Application {
+
+    private static final String BROWSE = "browse.";
+    public static final String DIGIT = "DIGIT";
+    private static Stage stage = null;
+
+    private static Map<String, String> urls = null;
+    private static TimeCalcConfiguration timeCalcConfiguration;
+
+    public static void show(TimeCalcConfiguration timeCalcConfigurationIn) {
+        timeCalcConfiguration = timeCalcConfigurationIn;
+        if (urls == null) {
+            urls = new HashMap<>();
+            for (int i = 0; i <= 9; i++) {
+                String key = BROWSE + DIGIT + i;
+                String value = timeCalcConfiguration.getProperty(
+                        key);
+                //System.out.println(key + "=" + value);
+                if (value != null && !value.isBlank()) {
+                    urls.put(key, value);
+                }
+            }
+        }
+        if (stage == null) {
+            Thread thread = new Thread(WebBrowser::startBrowser);
+            thread.setDaemon(true);
+            thread.start();
+        } else {
+            Platform.runLater(() -> stage.show());
+        }
+    }
+
+    private static void startBrowser() {
+        launch(WebBrowser.class);
+    }
+
+    public void start(Stage primaryStage) {
+        primaryStage.setTitle("Web Browser");
+
+        WebView webView = new WebView();
+
+        webView.setContextMenuEnabled(true);
+        WebEngine engine = webView.getEngine();
+        engine.setOnError(event -> System.out.println(event.getMessage()));
+        engine.setOnAlert(event -> System.out.println(event.getData()));
+
+        //        // local error console
+        //        com.sun.javafx.webkit.WebConsoleListener.setDefaultListener(
+        //                (webview, message, lineNumber, sourceId) -> System.out
+        //                        .println("Console: [" + sourceId + ":" + lineNumber + "] " + message));
+        //
+        //        webView.getEngine().locationProperty().addListener(
+        //                (observable, oldValue, newValue) -> System.out.println(newValue));
+
+        engine.load("https://pocasi.cz/praha");
+
+        VBox vBox = new VBox(webView);
+
+        Scene scene = new Scene(vBox, 1400, 800);
+        vBox.setMinHeight(800);
+        webView.setMinHeight(800);
+
+        scene.setOnKeyPressed(e -> {
+            if (e.getCode() == KeyCode.F5) {
+                engine.reload();
+            }
+            if (e.isControlDown() && e.getCode() == KeyCode.R) {
+                TextInputDialog dialog = new TextInputDialog();
+                dialog.setTitle("Run website");
+                Optional<String> result = dialog.showAndWait();
+                if (result.isPresent()) {
+                    String value = result.get();
+                    if (!value.startsWith("http")) {
+                        value = "https://" + value;
+                        System.out.println("Loading: " + value);
+                    }
+                    engine.load(value);
+                }
+            }
+
+            if (e.isControlDown() && e.getCode() == KeyCode.S) {
+                Integer[] digits = new Integer[] {0, 1, 2, 3, 4, 5, 6, 7, 8, 9};
+                ChoiceDialog<Integer>
+                        choiceDialog = new ChoiceDialog<>(digits[0], digits);
+                choiceDialog.showAndWait();
+                Integer selectedItem = choiceDialog.getSelectedItem();
+                if (selectedItem != null) {
+                    String key = BROWSE + DIGIT + selectedItem;
+                    String value = engine.getLocation();
+                    timeCalcConfiguration.setProperty(key, value);
+                    if (urls.containsKey(key)) {
+                        urls.replace(key, value);
+                    } else {
+                        urls.put(key, value);
+                    }
+                }
+
+            }
+
+            if (e.isControlDown() && e.getCode() == KeyCode.W) {
+
+                StringBuilder sb = new StringBuilder("These urls are saved: ");
+                sb.append("\n");
+                List<String> list = new ArrayList<>();
+                for (String key : urls.keySet()) {
+                    if (!key.contains(DIGIT)) {
+                        continue;
+                    }
+                    String value = urls.get(key);
+                    if (value == null || value.isBlank()) {
+                        continue;
+                    }
+                    list.add(key.replace(BROWSE, "").replace(DIGIT, "") + "="
+                             + value + "\n");
+
+                }
+                Collections.sort(list);
+                for(String s :list) {
+                    sb.append(s);
+                }
+                Utils.showNotification(sb.toString(), 30000, 400);
+            }
+
+            for (int i = 0; i <= 9; i++) {
+                if (!e.getCode().name().contains(DIGIT)) {
+                    break;
+                }
+                if (e.getCode().name().equals(DIGIT + i)) {
+                    String key = BROWSE + DIGIT + i;
+                    if (urls.containsKey(key)) {
+                        String value = urls.get(key);
+                        if (value != null && !value.isBlank()) {
+                            if (!value.startsWith("http")) {
+                                value = "https://" + value;
+                            }
+                            engine.load(value);
+                        }
+                    }
+                }
+
+            }
+
+        });
+        primaryStage.setScene(scene);
+        primaryStage.setTitle("Web Browser");
+
+        stage = primaryStage;
+        stage.show();
+        Platform.setImplicitExit(false);
+        stage.setOnCloseRequest(event -> stage.hide());
+
+        //        Thread t = new Thread(() -> {
+        //            while (true) {
+        //                System.out.println("ahoj" + stage.isShowing());
+        //                try {
+        //                    Thread.sleep(100);
+        //                } catch (InterruptedException e) {
+        //                    e.printStackTrace();
+        //                }
+        //            }
+        //        });
+        //        t.setDaemon(true);
+        //        t.start();
+
+    }
+}
diff --git a/pom.xml b/pom.xml
index bba827b..f8d4757 100644
--- a/pom.xml
+++ b/pom.xml
@@ -10,9 +10,9 @@
 
     <properties>
         <time-calc.version>0.1.0-SNAPSHOT</time-calc.version>
-        <java.version>1.8</java.version>
-        <maven.compiler.source>8</maven.compiler.source>
-        <maven.compiler.target>8</maven.compiler.target>
+        <java.version>21</java.version>
+        <maven.compiler.source>21</maven.compiler.source>
+        <maven.compiler.target>21</maven.compiler.target>
         <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
         <project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding>
         <lib.dir>${basedir}/lib</lib.dir>