diff --git a/apps/contacts/ajax/currentphoto.php b/apps/contacts/ajax/currentphoto.php
index 96080e661ef2012840e5cadce0801afbda2c3f05..c8cccf83a659d8ae4ec75103ada8ee5a5ddb2e25 100644
--- a/apps/contacts/ajax/currentphoto.php
+++ b/apps/contacts/ajax/currentphoto.php
@@ -20,8 +20,6 @@
  *
  */
 
-// Firefox and Konqueror tries to download application/json for me.  --Arthur
-OCP\JSON::setContentTypeHeader('text/plain');
 OCP\JSON::checkLoggedIn();
 OCP\JSON::checkAppEnabled('contacts');
 require_once 'loghandler.php';
diff --git a/apps/contacts/ajax/savecrop.php b/apps/contacts/ajax/savecrop.php
index 8ee2e46bf0c36da6d187eed6191b0cdbc890558b..07de138757da0f5bb29de53e6f40b9fc8c493e2f 100644
--- a/apps/contacts/ajax/savecrop.php
+++ b/apps/contacts/ajax/savecrop.php
@@ -24,9 +24,6 @@ OCP\JSON::checkLoggedIn();
 OCP\JSON::checkAppEnabled('contacts');
 OCP\JSON::callCheck();
 
-// Firefox and Konqueror tries to download application/json for me.  --Arthur
-OCP\JSON::setContentTypeHeader('text/plain');
-
 require_once 'loghandler.php';
 
 $image = null;
diff --git a/apps/contacts/ajax/uploadphoto.php b/apps/contacts/ajax/uploadphoto.php
index 4cd38db8c72a8407e917ec455a4303806ad0119f..63abeb1fee1797aa7216bbc37bac25981c0609c4 100644
--- a/apps/contacts/ajax/uploadphoto.php
+++ b/apps/contacts/ajax/uploadphoto.php
@@ -25,8 +25,6 @@ OCP\JSON::checkLoggedIn();
 OCP\JSON::checkAppEnabled('contacts');
 OCP\JSON::callCheck();
 
-// Firefox and Konqueror tries to download application/json for me.  --Arthur
-OCP\JSON::setContentTypeHeader('text/plain');
 require_once 'loghandler.php';
 $l10n = OC_Contacts_App::$l10n;
 // If it is a Drag'n'Drop transfer it's handled here.