diff --git a/src/App.php b/src/App.php
index f37e185353..f417224e01 100644
--- a/src/App.php
+++ b/src/App.php
@@ -4,7 +4,6 @@
  */
 namespace Friendica;
 
-use Detection\MobileDetect;
 use Exception;
 use Friendica\App\Arguments;
 use Friendica\App\BaseURL;
@@ -67,7 +66,9 @@ class App
 	public $timezone;
 	public $interactive = true;
 	public $identities;
+	/** @deprecated 2019.09 - Use App\Mode->isMobile() instead */
 	public $is_mobile;
+	/** @deprecated 2019.09 - Use App\Mode->isTable() instead */
 	public $is_tablet;
 	public $theme_info  = [];
 	public $category;
@@ -86,11 +87,6 @@ class App
 	 */
 	private $mode;
 
-	/**
-	 * @var App\Router
-	 */
-	private $router;
-
 	/**
 	 * @var BaseURL
 	 */
@@ -101,16 +97,6 @@ class App
 	 */
 	private $currentTheme;
 
-	/**
-	 * @var bool check if request was an AJAX (xmlhttprequest) request
-	 */
-	private $isAjax;
-
-	/**
-	 * @var MobileDetect
-	 */
-	public $mobileDetect;
-
 	/**
 	 * @var Configuration The config
 	 */
@@ -234,26 +220,22 @@ class App
 	 * @param Database        $database     The Friendica Database
 	 * @param Configuration   $config       The Configuration
 	 * @param App\Mode        $mode         The mode of this Friendica app
-	 * @param App\Router      $router       The router of this Friendica app
 	 * @param BaseURL         $baseURL      The full base URL of this Friendica app
 	 * @param LoggerInterface $logger       The current app logger
 	 * @param Profiler        $profiler     The profiler of this application
 	 * @param L10n            $l10n         The translator instance
 	 * @param App\Arguments   $args         The Friendica Arguments of the call
-	 * @param MobileDetect    $mobileDetect A mobile detection class
 	 */
-	public function __construct(Database $database, Configuration $config, App\Mode $mode, App\Router $router, BaseURL $baseURL, LoggerInterface $logger, Profiler $profiler, L10n $l10n, Arguments $args, App\Module $module, App\Page $page, MobileDetect $mobileDetect)
+	public function __construct(Database $database, Configuration $config, App\Mode $mode, BaseURL $baseURL, LoggerInterface $logger, Profiler $profiler, L10n $l10n, Arguments $args, App\Module $module, App\Page $page)
 	{
 		$this->database     = $database;
 		$this->config       = $config;
 		$this->mode         = $mode;
-		$this->router       = $router;
 		$this->baseURL      = $baseURL;
 		$this->profiler     = $profiler;
 		$this->logger       = $logger;
 		$this->l10n         = $l10n;
 		$this->args         = $args;
-		$this->mobileDetect = $mobileDetect;
 
 		$this->cmd          = $args->getCommand();
 		$this->argv         = $args->getArgv();
@@ -262,10 +244,8 @@ class App
 		$this->module       = $module->getName();
 		$this->page         = $page;
 
-		$this->is_mobile = $mobileDetect->isMobile();
-		$this->is_tablet = $mobileDetect->isTablet();
-
-		$this->isAjax = strtolower(defaults($_SERVER, 'HTTP_X_REQUESTED_WITH', '')) == 'xmlhttprequest';
+		$this->is_mobile = $mode->isMobile();
+		$this->is_tablet = $mode->isTablet();
 
 		$this->load();
 	}
@@ -417,20 +397,6 @@ class App
 			$this->getBaseURL();
 	}
 
-	/**
-	 * Returns true, if the call is from a backend node (f.e. from a worker)
-	 *
-	 * @return bool Is it a known backend?
-	 *
-	 * @deprecated 2019.09 - use App\Mode->isBackend() instead
-	 * @see        App\Mode::isBackend()
-	 * Use BaseObject::getClass(App\Mode::class) to get the global instance of Mode
-	 */
-	public function isBackend()
-	{
-		return $this->mode->isBackend();
-	}
-
 	/**
 	 * @brief Checks if the maximum number of database processes is reached
 	 *
@@ -705,13 +671,12 @@ class App
 	}
 
 	/**
-	 * Check if request was an AJAX (xmlhttprequest) request.
-	 *
-	 * @return boolean true if it was an AJAX request
+	 * @deprecated 2019.09 - use App\Mode->isAjax() instead
+	 * @see App\Mode::isAjax()
 	 */
 	public function isAjax()
 	{
-		return $this->isAjax;
+		return $this->mode->isAjax();
 	}
 
 	/**
diff --git a/src/App/Mode.php b/src/App/Mode.php
index 2a6722643e..f3f269b87b 100644
--- a/src/App/Mode.php
+++ b/src/App/Mode.php
@@ -2,6 +2,7 @@
 
 namespace Friendica\App;
 
+use Detection\MobileDetect;
 use Friendica\Core\Config\Cache\ConfigCache;
 use Friendica\Database\Database;
 use Friendica\Util\BasePath;
@@ -29,10 +30,28 @@ class Mode
 	 */
 	private $isBackend;
 
-	public function __construct(int $mode = 0, bool $isBackend = false)
+	/**
+	 * @var bool True, if the call is a ajax call
+	 */
+	private $isAjax;
+
+	/**
+	 * @var bool True, if the call is from a mobile device
+	 */
+	private $isMobile;
+
+	/**
+	 * @var bool True, if the call is from a tablet device
+	 */
+	private $isTablet;
+
+	public function __construct(int $mode = 0, bool $isBackend = false, bool $isAjax = false, bool $isMobile = false, bool $isTablet = false)
 	{
 		$this->mode      = $mode;
 		$this->isBackend = $isBackend;
+		$this->isAjax    = $isAjax;
+		$this->isMobile  = $isMobile;
+		$this->isTablet  = $isTablet;
 	}
 
 	/**
@@ -81,23 +100,27 @@ class Mode
 
 		$mode |= Mode::MAINTENANCEDISABLED;
 
-		return new Mode($mode, $this->isBackend);
+		return new Mode($mode, $this->isBackend, $this->isAjax, $this->isMobile, $this->isTablet);
 	}
 
 	/**
 	 * Checks if the site is called via a backend process
 	 *
-	 * @param Module $module The pre-loaded module (just name, not class!)
-	 * @param array $server The $_SERVER variable
+	 * @param Module       $module       The pre-loaded module (just name, not class!)
+	 * @param array        $server       The $_SERVER variable
+	 * @param MobileDetect $mobileDetect The mobile detection library
 	 *
 	 * @return Mode returns the determined mode
 	 */
-	public function determineBackend(Module $module, array $server)
+	public function determineRunMode(Module $module, array $server, MobileDetect $mobileDetect)
 	{
 		$isBackend = basename(($server['PHP_SELF'] ?? ''), '.php') !== 'index' ||
 		             $module->isBackend();
+		$isMobile  = $mobileDetect->isMobile();
+		$isTablet  = $mobileDetect->isTablet();
+		$isAjax    = strtolower($server['HTTP_X_REQUESTED_WITH'] ?? '') == 'xmlhttprequest';
 
-		return new Mode($this->mode, $isBackend);
+		return new Mode($this->mode, $isBackend, $isAjax, $isMobile, $isTablet);
 	}
 
 	/**
@@ -146,4 +169,34 @@ class Mode
 	{
 		return $this->isBackend;
 	}
+
+	/**
+	 * Check if request was an AJAX (xmlhttprequest) request.
+	 *
+	 * @return bool true if it was an AJAX request
+	 */
+	public function isAjax()
+	{
+		return $this->isAjax;
+	}
+
+	/**
+	 * Check if request was a mobile request.
+	 *
+	 * @return bool true if it was an mobile request
+	 */
+	public function isMobile()
+	{
+		return $this->isMobile;
+	}
+
+	/**
+	 * Check if request was a tablet request.
+	 *
+	 * @return bool true if it was an tablet request
+	 */
+	public function isTablet()
+	{
+		return $this->isTablet;
+	}
 }
diff --git a/src/App/Page.php b/src/App/Page.php
index 5298a66cbd..0bccbd7396 100644
--- a/src/App/Page.php
+++ b/src/App/Page.php
@@ -245,11 +245,12 @@ class Page implements ArrayAccess
 	 * - footer.tpl template
 	 *
 	 * @param App  $app  The Friendica App instance
+	 * @param Mode $mode The Friendica runtime mode
 	 * @param L10n $l10n The l10n instance
 	 *
 	 * @throws HTTPException\InternalServerErrorException
 	 */
-	private function initFooter(App $app, L10n $l10n)
+	private function initFooter(App $app, Mode $mode, L10n $l10n)
 	{
 		// If you're just visiting, let javascript take you home
 		if (!empty($_SESSION['visitor_home'])) {
@@ -265,7 +266,7 @@ class Page implements ArrayAccess
 		/*
 		 * Add a "toggle mobile" link if we're using a mobile device
 		 */
-		if ($app->is_mobile || $app->is_tablet) {
+		if ($mode->isMobile() || $mode->isTablet()) {
 			if (isset($_SESSION['show-mobile']) && !$_SESSION['show-mobile']) {
 				$link = 'toggle_mobile?address=' . urlencode(curPageURL());
 			} else {
@@ -375,9 +376,9 @@ class Page implements ArrayAccess
 		/* Build the page ending -- this is stuff that goes right before
 		 * the closing </body> tag
 		 */
-		$this->initFooter($app, $l10n);
+		$this->initFooter($app, $mode, $l10n);
 
-		if (!$app->isAjax()) {
+		if (!$mode->isAjax()) {
 			Hook::callAll('page_end', $this->page['content']);
 		}
 
diff --git a/src/Core/Worker.php b/src/Core/Worker.php
index 709424c5ad..d3299fe2b3 100644
--- a/src/Core/Worker.php
+++ b/src/Core/Worker.php
@@ -1124,7 +1124,7 @@ class Worker
 
 		$priority = PRIORITY_MEDIUM;
 		// Don't fork from frontend tasks by default
-		$dont_fork = Config::get("system", "worker_dont_fork", false) || !\get_app()->isBackend();
+		$dont_fork = Config::get("system", "worker_dont_fork", false) || !\get_app()->getMode()->isBackend();
 		$created = DateTimeFormat::utcNow();
 		$force_priority = false;
 
diff --git a/static/dependencies.config.php b/static/dependencies.config.php
index d923c67bf2..2183c94120 100644
--- a/static/dependencies.config.php
+++ b/static/dependencies.config.php
@@ -62,7 +62,7 @@ return [
 	],
 	App\Mode::class                 => [
 		'call' => [
-			['determineBackend', [$_SERVER], Dice::CHAIN_CALL],
+			['determineRunMode', [$_SERVER], Dice::CHAIN_CALL],
 			['determine', [], Dice::CHAIN_CALL],
 		],
 	],
diff --git a/tests/src/App/ModeTest.php b/tests/src/App/ModeTest.php
index 56b9cc913f..fcd928e6ed 100644
--- a/tests/src/App/ModeTest.php
+++ b/tests/src/App/ModeTest.php
@@ -2,6 +2,7 @@
 
 namespace Friendica\Test\src\App;
 
+use Detection\MobileDetect;
 use Friendica\App\Mode;
 use Friendica\App\Module;
 use Friendica\Core\Config;
@@ -186,8 +187,9 @@ class ModeTest extends MockedTest
 	{
 		$server = ['PHP_SELF' => '/daemon.php'];
 		$module = new Module();
+		$mobileDetect = new MobileDetect();
 
-		$mode = (new Mode())->determineBackend($module, $server);
+		$mode = (new Mode())->determineRunMode($module, $server, $mobileDetect);
 
 		$this->assertTrue($mode->isBackend());
 	}
@@ -199,8 +201,9 @@ class ModeTest extends MockedTest
 	{
 		$server = ['PHP_SELF' => '/index.php'];
 		$module = new Module(Module::DEFAULT, Module::DEFAULT_CLASS, true);
+		$mobileDetect = new MobileDetect();
 
-		$mode = (new Mode())->determineBackend($module, $server);
+		$mode = (new Mode())->determineRunMode($module, $server, $mobileDetect);
 
 		$this->assertTrue($mode->isBackend());
 	}
@@ -212,9 +215,77 @@ class ModeTest extends MockedTest
 	{
 		$server = ['PHP_SELF' => '/index.php'];
 		$module = new Module(Module::DEFAULT, Module::DEFAULT_CLASS, false);
+		$mobileDetect = new MobileDetect();
 
-		$mode = (new Mode())->determineBackend($module, $server);
+		$mode = (new Mode())->determineRunMode($module, $server, $mobileDetect);
 
 		$this->assertFalse($mode->isBackend());
 	}
+
+	/**
+	 * Test if the call is an ajax call
+	 */
+	public function testIsAjax()
+	{
+		// This is the server environment variable to determine ajax calls
+		$server = [
+			'HTTP_X_REQUESTED_WITH' => 'xmlhttprequest',
+		];
+
+		$module = new Module(Module::DEFAULT, Module::DEFAULT_CLASS, false);
+		$mobileDetect = new MobileDetect();
+
+		$mode = (new Mode())->determineRunMode($module, $server, $mobileDetect);
+
+		$this->assertTrue($mode->isAjax());
+	}
+
+	/**
+	 * Test if the call is not nan ajax call
+	 */
+	public function testIsNotAjax()
+	{
+		$server = [];
+		$module = new Module(Module::DEFAULT, Module::DEFAULT_CLASS, false);
+		$mobileDetect = new MobileDetect();
+
+		$mode = (new Mode())->determineRunMode($module, $server, $mobileDetect);
+
+		$this->assertFalse($mode->isAjax());
+	}
+
+	/**
+	 * Test if the call is a mobile and is a tablet call
+	 */
+	public function testIsMobileIsTablet()
+	{
+		$server = [];
+		$module = new Module(Module::DEFAULT, Module::DEFAULT_CLASS, false);
+		$mobileDetect = \Mockery::mock(MobileDetect::class);
+		$mobileDetect->shouldReceive('isMobile')->andReturn(true);
+		$mobileDetect->shouldReceive('isTablet')->andReturn(true);
+
+		$mode = (new Mode())->determineRunMode($module, $server, $mobileDetect);
+
+		$this->assertTrue($mode->isMobile());
+		$this->assertTrue($mode->isTablet());
+	}
+
+
+	/**
+	 * Test if the call is not a mobile and is not a tablet call
+	 */
+	public function testIsNotMobileIsNotTablet()
+	{
+		$server = [];
+		$module = new Module(Module::DEFAULT, Module::DEFAULT_CLASS, false);
+		$mobileDetect = \Mockery::mock(MobileDetect::class);
+		$mobileDetect->shouldReceive('isMobile')->andReturn(false);
+		$mobileDetect->shouldReceive('isTablet')->andReturn(false);
+
+		$mode = (new Mode())->determineRunMode($module, $server, $mobileDetect);
+
+		$this->assertFalse($mode->isMobile());
+		$this->assertFalse($mode->isTablet());
+	}
 }