diff --git a/libraries/joomla/application/web.php b/libraries/joomla/application/web.php
index 76ae9b064251b..b7762d5f0bf59 100644
--- a/libraries/joomla/application/web.php
+++ b/libraries/joomla/application/web.php
@@ -539,7 +539,7 @@ public function redirect($url, $status = 303)
 			}
 			else
 			{
-				// Check if we have a boolean for the status variable for compatability with old $move parameter
+				// Check if we have a boolean for the status variable for compatibility with old $move parameter
 				// @deprecated 4.0
 				if (is_bool($status))
 				{
@@ -553,6 +553,19 @@ public function redirect($url, $status = 303)
 					$status = 303;
 				}
 
+				// Prevent browser / proxy caching for the case of 303 redirect
+				if ($status == 303)
+				{
+					// HTTP 1.1
+					$this->header('Cache-Control: no-cache, no-store, must-revalidate');
+
+					// HTTP 1.0
+					$this->header('Pragma: no-cache');
+
+					// Proxies
+					$this->header('Expires: 0');
+				}
+
 				// All other cases use the more efficient HTTP header for redirection.
 				$this->header($this->responseMap[$status]);
 				$this->header('Location: ' . $url);
@@ -560,6 +573,9 @@ public function redirect($url, $status = 303)
 			}
 		}
 
+		// Close the session after the redirect to prevent session issues on slow handlers
+		$this->session->close();
+
 		// Close the application after the redirect.
 		$this->close();
 	}
diff --git a/tests/unit/suites/libraries/cms/application/JApplicationCmsTest.php b/tests/unit/suites/libraries/cms/application/JApplicationCmsTest.php
index 62b0b055fc5e0..e0d31e8aa31d2 100644
--- a/tests/unit/suites/libraries/cms/application/JApplicationCmsTest.php
+++ b/tests/unit/suites/libraries/cms/application/JApplicationCmsTest.php
@@ -208,7 +208,7 @@ public function testExecuteWithoutDocument()
 
 		// Register all the methods so that we can track if they have been fired.
 		$this->class->registerEvent('JWebDoExecute', 'JWebTestExecute-JWebDoExecute')
-			->registerEvent('onAfterRespond', 'JWebTestExecute-onAfterRespond');
+					->registerEvent('onAfterRespond', 'JWebTestExecute-onAfterRespond');
 
 		$this->class->execute();
 
@@ -237,9 +237,9 @@ public function testExecuteWithDocument()
 
 		// Register all the methods so that we can track if they have been fired.
 		$this->class->registerEvent('JWebDoExecute', 'JWebTestExecute-JWebDoExecute')
-			->registerEvent('onBeforeRender', 'JWebTestExecute-onBeforeRender')
-			->registerEvent('onAfterRender', 'JWebTestExecute-onAfterRender')
-			->registerEvent('onAfterRespond', 'JWebTestExecute-onAfterRespond');
+					->registerEvent('onBeforeRender', 'JWebTestExecute-onBeforeRender')
+					->registerEvent('onAfterRender', 'JWebTestExecute-onAfterRender')
+					->registerEvent('onAfterRespond', 'JWebTestExecute-onAfterRespond');
 
 		// Buffer the execution.
 		ob_start();
@@ -389,11 +389,15 @@ public function testRedirect()
 		$config->set('uri.base.full', $base);
 
 		TestReflection::setValue($this->class, 'config', $config);
+		TestReflection::setValue($this->class, 'session', $this->getMockSession());
 
 		$this->class->redirect($url, false);
 
 		$this->assertEquals(
 			array(
+				array('Cache-Control: no-cache, no-store, must-revalidate', true, null),
+				array('Pragma: no-cache', true, null),
+				array('Expires: 0', true, null),
 				array('HTTP/1.1 303 See other', true, null),
 				array('Location: ' . $base . $url, true, null),
 				array('Content-Type: text/html; charset=utf-8', true, null),
@@ -428,6 +432,7 @@ public function testRedirectLegacy()
 		$config->set('uri.base.full', $base);
 
 		TestReflection::setValue($this->class, 'config', $config);
+		TestReflection::setValue($this->class, 'session', $this->getMockSession());
 
 		$this->class->redirect($url, 'Test Message', 'message', false);
 
@@ -443,6 +448,9 @@ public function testRedirectLegacy()
 
 		$this->assertEquals(
 			array(
+				array('Cache-Control: no-cache, no-store, must-revalidate', true, null),
+				array('Pragma: no-cache', true, null),
+				array('Expires: 0', true, null),
 				array('HTTP/1.1 303 See other', true, null),
 				array('Location: ' . $base . $url, true, null),
 				array('Content-Type: text/html; charset=utf-8', true, null),
@@ -477,6 +485,7 @@ public function testRedirectLegacyWithEmptyMessageAndEmptyStatus()
 		$config->set('uri.base.full', $base);
 
 		TestReflection::setValue($this->class, 'config', $config);
+		TestReflection::setValue($this->class, 'session', $this->getMockSession());
 
 		$this->class->redirect($url, '', 'message');
 
@@ -488,6 +497,9 @@ public function testRedirectLegacyWithEmptyMessageAndEmptyStatus()
 		// The redirect gives a 303 error code
 		$this->assertEquals(
 			array(
+				array('Cache-Control: no-cache, no-store, must-revalidate', true, null),
+				array('Pragma: no-cache', true, null),
+				array('Expires: 0', true, null),
 				array('HTTP/1.1 303 See other', true, null),
 				array('Location: ' . $base . $url, true, null),
 				array('Content-Type: text/html; charset=utf-8', true, null),
@@ -516,6 +528,7 @@ public function testRedirectWithHeadersSent()
 		$config->set('uri.base.full', $base);
 
 		TestReflection::setValue($this->class, 'config', $config);
+		TestReflection::setValue($this->class, 'session', $this->getMockSession());
 
 		// Capture the output for this test.
 		ob_start();
@@ -546,6 +559,8 @@ public function testRedirectWithJavascriptRedirect()
 			)
 		);
 
+		TestReflection::setValue($this->class, 'session', $this->getMockSession());
+
 		// Capture the output for this test.
 		ob_start();
 		$this->class->redirect($url);
@@ -579,6 +594,8 @@ public function testRedirectWithMoved()
 			)
 		);
 
+		TestReflection::setValue($this->class, 'session', $this->getMockSession());
+
 		$this->class->redirect($url, true);
 
 		$this->assertEquals(
@@ -621,10 +638,11 @@ public function testRedirectWithUrl($url, $base, $request, $expected)
 		$config->set('uri.request', $request);
 
 		TestReflection::setValue($this->class, 'config', $config);
+		TestReflection::setValue($this->class, 'session', $this->getMockSession());
 
 		$this->class->redirect($url, false);
 
-		$this->assertEquals('Location: ' . $expected, $this->class->headers[1][0]);
+		$this->assertEquals('Location: ' . $expected, $this->class->headers[4][0]);
 	}
 
 	/**
diff --git a/tests/unit/suites/libraries/joomla/application/JApplicationWebTest.php b/tests/unit/suites/libraries/joomla/application/JApplicationWebTest.php
index 9b624cce097e8..399dafe9a19d3 100644
--- a/tests/unit/suites/libraries/joomla/application/JApplicationWebTest.php
+++ b/tests/unit/suites/libraries/joomla/application/JApplicationWebTest.php
@@ -1045,11 +1045,15 @@ public function testRedirect()
 		$config->set('uri.base.full', $base);
 
 		TestReflection::setValue($this->class, 'config', $config);
+		TestReflection::setValue($this->class, 'session', $this->getMockSession());
 
 		$this->class->redirect($url, false);
 
 		$this->assertEquals(
 			array(
+				array('Cache-Control: no-cache, no-store, must-revalidate', true, null),
+				array('Pragma: no-cache', true, null),
+				array('Expires: 0', true, null),
 				array('HTTP/1.1 303 See other', true, null),
 				array('Location: ' . $base . $url, true, null),
 				array('Content-Type: text/html; charset=utf-8', true, null),
@@ -1078,6 +1082,7 @@ public function testRedirectWithHeadersSent()
 		$config->set('uri.base.full', $base);
 
 		TestReflection::setValue($this->class, 'config', $config);
+		TestReflection::setValue($this->class, 'session', $this->getMockSession());
 
 		// Capture the output for this test.
 		ob_start();
@@ -1107,6 +1112,8 @@ public function testRedirectWithJavascriptRedirect()
 			)
 		);
 
+		TestReflection::setValue($this->class, 'session', $this->getMockSession());
+
 		// Capture the output for this test.
 		ob_start();
 		$this->class->redirect($url);
@@ -1138,6 +1145,8 @@ public function testRedirectWithMoved()
 			)
 		);
 
+		TestReflection::setValue($this->class, 'session', $this->getMockSession());
+
 		$this->class->redirect($url, true);
 
 		$this->assertEquals(
@@ -1180,10 +1189,11 @@ public function testRedirectWithUrl($url, $base, $request, $expected)
 		$config->set('uri.request', $request);
 
 		TestReflection::setValue($this->class, 'config', $config);
+		TestReflection::setValue($this->class, 'session', $this->getMockSession());
 
 		$this->class->redirect($url, false);
 
-		$this->assertEquals('Location: ' . $expected, $this->class->headers[1][0]);
+		$this->assertEquals('Location: ' . $expected, $this->class->headers[4][0]);
 	}
 
 	/**
@@ -1265,6 +1275,7 @@ public function testSet()
 		$config = new Registry(array('foo' => 'bar'));
 
 		TestReflection::setValue($this->class, 'config', $config);
+		TestReflection::setValue($this->class, 'session', $this->getMockSession());
 
 		$this->assertEquals('bar', $this->class->set('foo', 'car'));