diff --git a/.github/workflows/build-release.yml b/.github/workflows/build-release.yml
index ac84495540..b169aef65e 100644
--- a/.github/workflows/build-release.yml
+++ b/.github/workflows/build-release.yml
@@ -12,7 +12,7 @@ jobs:
     container:
       image: ghcr.io/mvorisek/image-php:latest
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
         with:
           ref: ${{ github.ref }}
 
diff --git a/.github/workflows/test-unit.yml b/.github/workflows/test-unit.yml
index 4262066fdb..71d1530c37 100644
--- a/.github/workflows/test-unit.yml
+++ b/.github/workflows/test-unit.yml
@@ -24,7 +24,7 @@ jobs:
             type: 'StaticAnalysis'
     steps:
       - name: Checkout
-        uses: actions/checkout@v3
+        uses: actions/checkout@v4
 
       - name: Configure PHP
         run: |
@@ -111,7 +111,7 @@ jobs:
           ORACLE_PASSWORD: atk4_pass
     steps:
       - name: Checkout
-        uses: actions/checkout@v3
+        uses: actions/checkout@v4
 
       - name: Configure PHP
         run: |
@@ -245,6 +245,8 @@ jobs:
             type: 'Firefox'
           - php: 'latest'
             type: 'Chrome Slow'
+          - php: 'latest'
+            type: 'Firefox Slow'
     env:
       LOG_COVERAGE: "${{ fromJSON('{true: \"1\", false: \"\"}')[matrix.php == '8.2' && matrix.type == 'Chrome' && (github.event_name == 'pull_request' || (github.event_name == 'push' && (github.ref == 'refs/heads/develop' || github.ref == 'refs/heads/master')))] }}"
     services:
@@ -272,7 +274,7 @@ jobs:
           ORACLE_PASSWORD: atk4_pass
     steps:
       - name: Checkout
-        uses: actions/checkout@v3
+        uses: actions/checkout@v4
 
       - name: Configure PHP
         run: |
@@ -292,7 +294,7 @@ jobs:
           restore-keys: |
             ${{ runner.os }}-composer-
 
-      - name: Install JS dependencies (only for coverage or Slow)
+      - name: Install JS dependencies (only for coverage or Chrome Slow)
         if: env.LOG_COVERAGE || matrix.type == 'Chrome Slow'
         run: |
           if [ -n "$LOG_COVERAGE" ]; then
@@ -313,25 +315,25 @@ jobs:
             (cd public/external && npm ci --loglevel=error && git clean -dxfq .)
           fi
 
-      - name: Lint JS files (only for Slow)
+      - name: Lint JS files (only for Chrome Slow)
         if: matrix.type == 'Chrome Slow'
         run: |
           cp public/external/postinstall.js js
           (cd js && npm run lint)
 
-      - name: Compile HTML files (only for Slow)
+      - name: Compile HTML files (only for Chrome Slow)
         if: matrix.type == 'Chrome Slow'
         run: |
           cp -r template template.orig
           find template -not -type d -not -name '*.pug' -delete
           (cd template && pug --doctype html --pretty --silent .)
 
-      - name: Compile CSS files (only for Slow)
+      - name: Compile CSS files (only for Chrome Slow)
         if: matrix.type == 'Chrome Slow'
         run: |
           lessc public/css/agileui.less public/css/agileui.min.css --clean-css="--s1 --advanced" --source-map
 
-      - name: Compile JS files (only for coverage or Slow)
+      - name: Compile JS files (only for coverage or Chrome Slow)
         if: env.LOG_COVERAGE || matrix.type == 'Chrome Slow'
         run: |
           if [ -n "$LOG_COVERAGE" ]; then
@@ -341,7 +343,7 @@ jobs:
             (cd js && npm run build)
           fi
 
-      - name: Diff compiled files (only for Slow)
+      - name: Diff compiled files (only for Chrome Slow)
         if: matrix.type == 'Chrome Slow'
         run: |
           diff -ru public.orig public
@@ -372,8 +374,8 @@ jobs:
           ci_wait_until '[ -e /tmp/.X11-unix/X99 ]'
           su browser -c 'java -Dwebdriver.chrome.whitelistedIps=127.0.0.1 -jar /opt/selenium-server-standalone.jar -role standalone -host 127.0.0.1 -port 4444 -sessionTimeout 15 -browserTimeout 12 > /dev/null 2>&1 &'
           ci_wait_until 'nc -w 1 127.0.0.1 4444'
-          if [ "${{ matrix.type }}" = "Firefox" ]; then sed -i "s~chrome~firefox~" behat.yml.dist; fi
-          if [ "${{ matrix.type }}" = "Chrome Slow" ]; then echo 'sleep(1);' >> demos/init-app.php; fi
+          if [ "${{ matrix.type }}" = "Firefox" ] || [ "${{ matrix.type }}" = "Firefox Slow" ]; then sed -i "s~chrome~firefox~" behat.yml.dist; fi
+          if [ "${{ matrix.type }}" = "Chrome Slow" ] || [ "${{ matrix.type }}" = "Firefox Slow" ]; then echo 'usleep(500_000);' >> demos/init-app.php; fi
 
       - name: "Run tests: SQLite"
         run: |
@@ -463,7 +465,7 @@ jobs:
       image: ghcr.io/mvorisek/image-php:latest
     steps:
       - name: Checkout
-        uses: actions/checkout@v3
+        uses: actions/checkout@v4
 
       - name: Install Python and dependencies
         run: |
diff --git a/src/App.php b/src/App.php
index 903afcce91..efc41481f9 100644
--- a/src/App.php
+++ b/src/App.php
@@ -299,7 +299,7 @@ public function caughtException(\Throwable $exception): void
         // remove header
         $this->layout->template->tryDel('Header');
 
-        if (($this->isJsUrlRequest() || ($_SERVER['HTTP_X_REQUESTED_WITH'] ?? '') === 'XMLHttpRequest')
+        if (($this->isJsUrlRequest() || $this->getRequest()->getHeaderLine('X-Requested-With') === 'XMLHttpRequest')
                 && !isset($_GET['__atk_tab'])) {
             $this->outputResponseJson([
                 'success' => false,
diff --git a/src/Behat/Context.php b/src/Behat/Context.php
index 1b27c43e3b..b7d5e857fa 100644
--- a/src/Behat/Context.php
+++ b/src/Behat/Context.php
@@ -148,10 +148,12 @@ protected function disableAnimations(): void
         ]);
 
         $this->getSession()->executeScript(
-            'if (Array.prototype.filter.call(document.getElementsByTagName(\'style\'), (e) => e.getAttribute(\'about\') === \'atk-test-behat\').length === 0) {'
-            . ' $(\'<style about="atk-test-behat">' . $css . '</style>\').appendTo(\'head\');'
+            'if (Array.prototype.filter.call(document.getElementsByTagName(\'style\'), (e) => e.getAttribute(\'about\') === \'atk4-ui-behat\').length === 0) {'
+            . ' $(\'<style about="atk4-ui-behat">' . $css . '</style>\').appendTo(\'head\');'
+            . ' jQuery.fx.off = true;'
+            // fix self::getFinishedScript() detection for Firefox - document.readyState is updated after at least part of a new page has been loaded
+            . ' window.addEventListener(\'beforeunload\', (event) => jQuery.active++);'
             . ' }'
-            . 'jQuery.fx.off = true;'
         );
     }
 
@@ -353,6 +355,26 @@ public function iClickUsingSelector(string $selector): void
         $element->click();
     }
 
+    /**
+     * \Behat\Mink\Driver\Selenium2Driver::clickOnElement() does not wait until AJAX is completed after scroll.
+     *
+     * One solution can be waiting for AJAX after each \WebDriver\AbstractWebDriver::curl() call.
+     *
+     * @Then PATCH DRIVER I click using selector :selector
+     */
+    public function iClickPatchedUsingSelector(string $selector): void
+    {
+        $element = $this->findElement(null, $selector);
+
+        $driver = $this->getSession()->getDriver();
+        \Closure::bind(static function () use ($driver, $element) {
+            $driver->mouseOverElement($driver->findElement($element->getXpath()));
+        }, null, MinkSeleniumDriver::class)();
+        $this->jqueryWait();
+
+        $element->click();
+    }
+
     /**
      * @Then I click paginator page :arg1
      */
diff --git a/tests-behat/scroll.feature b/tests-behat/scroll.feature
index 5fde00a973..482a87caee 100644
--- a/tests-behat/scroll.feature
+++ b/tests-behat/scroll.feature
@@ -45,6 +45,6 @@ Feature: Dynamic scroll
     Given I am on "interactive/scroll-grid-container.php"
     Then I should see "Brazil"
     Then I should not see "Canada"
-    When I click using selector "//table//tr/td[text()='Brazil']"
+    When PATCH DRIVER I click using selector "//table//tr/td[text()='Brazil']"
     Then I should see "Brazil"
     Then I should see "Canada"