diff --git a/ChangeLog b/ChangeLog
index 396dc11522..1bf0eb4d4b 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -57,6 +57,7 @@ phpMyAdmin - ChangeLog
 - issue #17553 Fix Metro theme unreadable links above navigation tree
 - issue #17553 Metro theme UI fixes and improvements
 - issue #17553 Fix Metro theme login form with
+- issue #16042 Exported gzip file of database has first ~73 kB uncompressed and rest is gzip compressed in Firefox
 
 5.2.0 (2022-05-10)
 - issue #16521 Upgrade Bootstrap to version 5
diff --git a/js/src/functions.js b/js/src/functions.js
index 0cf706e54e..71c64f99ca 100644
--- a/js/src/functions.js
+++ b/js/src/functions.js
@@ -2978,6 +2978,9 @@ Functions.onloadEnumSetEditor = function () {
         }
         var buttonOptions = {};
         var $centralColumnsDialog = $(centralColumnsDialog).dialog({
+            classes: {
+                'ui-dialog-titlebar-close': 'btn-close'
+            },
             minWidth: width,
             maxHeight: 450,
             modal: true,
diff --git a/libraries/classes/Core.php b/libraries/classes/Core.php
index 6f7789a1d1..5366129d62 100644
--- a/libraries/classes/Core.php
+++ b/libraries/classes/Core.php
@@ -42,7 +42,6 @@ use function preg_match;
 use function preg_replace;
 use function session_write_close;
 use function sprintf;
-use function str_contains;
 use function str_replace;
 use function strlen;
 use function strpos;
@@ -467,24 +466,10 @@ class Core
 
         $headers['Content-Type'] = $mimetype;
 
-        /** @var string $browserAgent */
-        $browserAgent = $GLOBALS['config']->get('PMA_USR_BROWSER_AGENT');
-
-        // inform the server that compression has been done,
-        // to avoid a double compression (for example with Apache + mod_deflate)
-        if (str_contains($mimetype, 'gzip')) {
-            /**
-             * @see https://github.com/phpmyadmin/phpmyadmin/issues/11283
-             */
-            if ($browserAgent !== 'CHROME') {
-                $headers['Content-Encoding'] = 'gzip';
-            }
-        } else {
-            // The default output in PMA uses gzip,
-            // so if we want to output uncompressed file, we should reset the encoding.
-            // See PHP bug https://github.com/php/php-src/issues/8218
-            header_remove('Content-Encoding');
-        }
+        // The default output in PMA uses gzip,
+        // so if we want to output uncompressed file, we should reset the encoding.
+        // See PHP bug https://github.com/php/php-src/issues/8218
+        header_remove('Content-Encoding');
 
         $headers['Content-Transfer-Encoding'] = 'binary';
 
diff --git a/test/classes/CoreTest.php b/test/classes/CoreTest.php
index 2c958ef7fe..4956e94bac 100644
--- a/test/classes/CoreTest.php
+++ b/test/classes/CoreTest.php
@@ -1036,7 +1036,7 @@ class CoreTest extends AbstractNetworkTestCase
         $this->assertContains('Content-Description: File Transfer', $headersList);
         $this->assertContains('Content-Disposition: attachment; filename="test.sql.gz"', $headersList);
         $this->assertContains('Content-Type: application/x-gzip', $headersList);
-        $this->assertContains('Content-Encoding: gzip', $headersList);
+        $this->assertNotContains('Content-Encoding: gzip', $headersList);
         $this->assertContains('Content-Transfer-Encoding: binary', $headersList);
         $this->assertNotContains('Content-Length: 0', $headersList);
     }
diff --git a/test/classes/SqlTest.php b/test/classes/SqlTest.php
index 1034123efb..805a655bc2 100644
--- a/test/classes/SqlTest.php
+++ b/test/classes/SqlTest.php
@@ -362,6 +362,34 @@ class SqlTest extends AbstractTestCase
         // result
         // just browsing
         return [
+            'join on SELECT results with *' => [
+                // -- Showing rows 0 - 49 (164056 total, 0 in query, Query took 0.1498 seconds.)
+                'select * from game_auth_logs l join ('
+                    . ' select al.user_id, max(al.id) as id from game_auth_logs al '
+                    . 'where al.successfull = 1 group by al.user_id ) last_log on last_log.id = l.id;',
+                ['max_rows' => 50, 'pos' => 0],
+                164056,
+                50,
+                false,
+                'SELECT COUNT(*) FROM (select * from game_auth_logs l join ('
+                    . ' select al.user_id, max(al.id) as id from game_auth_logs al '
+                    . 'where al.successfull = 1 group by al.user_id ) last_log on last_log.id = l.id'
+                    . ' ) as cnt',
+            ],
+            'join on SELECT results with alias.*' => [
+                // -- Showing rows 0 - 24 (267 total, Query took 0.1533 seconds.)
+                'select l.* from game_auth_logs l join ('
+                    . ' select al.user_id, max(al.id) as id from game_auth_logs al '
+                    . 'where al.successfull = 1 group by al.user_id ) last_log on last_log.id = l.id;',
+                ['max_rows' => 50, 'pos' => 0],
+                267,
+                50,
+                false,
+                'SELECT COUNT(*) FROM (select l.* from game_auth_logs l join ('
+                    . ' select al.user_id, max(al.id) as id from game_auth_logs al '
+                    . 'where al.successfull = 1 group by al.user_id ) last_log on last_log.id = l.id'
+                    . ' ) as cnt',
+            ],
             [
                 'SELECT * FROM company_users WHERE id != 0 LIMIT 0, 10',
                 ['max_rows' => 250],
@@ -546,7 +574,8 @@ class SqlTest extends AbstractTestCase
         array $sessionTmpVal,
         int $numRows,
         int $expectedNumRows,
-        bool $justBrowsing = false
+        bool $justBrowsing = false,
+        ?string $expectedCountQuery = null
     ): void {
         if ($justBrowsing) {
             $GLOBALS['cfg']['Server']['DisableIS'] = true;
@@ -554,6 +583,15 @@ class SqlTest extends AbstractTestCase
 
         $_SESSION['tmpval'] = $sessionTmpVal;
 
+        if ($expectedCountQuery !== null) {
+            $this->dummyDbi->addResult(
+                $expectedCountQuery,
+                [[$expectedNumRows]],
+                [],
+                []
+            );
+        }
+
         $result = $this->callFunction(
             $this->sql,
             Sql::class,
@@ -567,6 +605,7 @@ class SqlTest extends AbstractTestCase
             ]
         );
         $this->assertSame($expectedNumRows, $result);
+        $this->dummyDbi->assertAllQueriesConsumed();
     }
 
     public function testExecuteQueryAndSendQueryResponse(): void