diff --git a/Classes/Common/Doc.php b/Classes/Common/Doc.php
index a9a7a0ebb0..ca9b13ad1d 100644
--- a/Classes/Common/Doc.php
+++ b/Classes/Common/Doc.php
@@ -1388,9 +1388,12 @@ public function toArray($uriBuilder, array $config = [])
                     }
                 }
 
+                $extConf = GeneralUtility::makeInstance(ExtensionConfiguration::class)->get(self::$extKey);
+                $nonProxyMimeTypes = GeneralUtility::trimExplode(',', $extConf['nonProxyMimeTypes']);
+
                 // Only deliver static images via the internal PageViewProxy.
                 // (For IIP and IIIF, the viewer needs to build and access a separate metadata URL, see `getMetadataURL`.)
-                if (in_array($fileGrp, $proxyFileGroups) && !in_array($file['mimetype'], self::$nonProxyMimeTypes)) {
+                if (in_array($fileGrp, $proxyFileGroups) && !in_array($file['mimetype'], $nonProxyMimeTypes)) {
                     // Configure @action URL for form.
                     $file['url'] = $uriBuilder
                         ->reset()
diff --git a/Resources/Private/Language/Labels.xml b/Resources/Private/Language/Labels.xml
index 66ba9bfe0f..6656b26941 100644
--- a/Resources/Private/Language/Labels.xml
+++ b/Resources/Private/Language/Labels.xml
@@ -180,6 +180,7 @@
             <label index="config.caching">Cache parsed METS files / IIIF manifests: Caching improves performance a little bit but can result in a very large "fe_session_data" table (default is "FALSE")</label>
             <label index="config.publishNewCollections">Publish new collections?: Should new collections automatically be published in the OAI-PMH interface? (default is "TRUE")</label>
             <label index="config.unhideOnIndex">Unhide indexed documents?: Should hidden documents be unhidden when re-indexing them? (default is "FALSE")</label>
+            <label index="config.nonProxyMimeType">Non proxy MIME types: comma-separated list (default is "application/vnd.kitodo.iiif,application/vnd.netfpx,application/vnd.kitodo.zoomify")</label>
             <label index="config.useExternalApisForMetadata">Use external APIs for getting metadata?: (default is "FALSE")</label>
             <label index="config.fileGrpImages">Page fileGrps: comma-separated list of @USE attribute values ordered by increasing size (default is "DEFAULT,MAX")</label>
             <label index="config.fileGrpThumbs">Thumbnail fileGrp: comma-separated list of @USE attribute values ordered by decreasing priority (default is "THUMBS")</label>
@@ -391,6 +392,7 @@
             <label index="config.caching">Eingelesene METS Dateien / IIIF-Manifeste zwischenspeichern: Dies kann die Geschwindigkeit geringfügig verbessern, führt aber zu einer sehr großen "fe_session_data" Tabelle (Standard ist "FALSE")</label>
             <label index="config.publishNewCollections">Neue Kollektionen publizieren?: Sollen neue Kollektionen automatisch in der OAI-PMH-Schnittstelle veröffentlicht werden? (Standard ist "TRUE")</label>
             <label index="config.unhideOnIndex">Indexierte Dokumente einblenden?: Sollen ausgeblendete Dokumente bei der erneuten Indexierung wieder eingeblendet werden? (Standard ist "FALSE")</label>
+            <label index="config.nonProxyMimeType">MIME Typen ohne Proxy: Komma-getrennte Liste (Standard ist "application/vnd.kitodo.iiif,application/vnd.netfpx,application/vnd.kitodo.zoomify")</label>
             <label index="config.useExternalApisForMetadata">Verwende externe APIs zum Abrufen von Metadaten?: (Standard ist "FALSE")</label>
             <label index="config.fileGrpImages">Seiten fileGrps: Komma-getrennte Liste der @USE Attributwerte der Seitenansichten nach aufsteigender Größe sortiert (Standard ist "DEFAULT,MAX")</label>
             <label index="config.fileGrpThumbs">Vorschau fileGrp: Komma-getrennte Liste der @USE Attributwerte der Vorschaubilder nach absteigender Priorität sortiert (Standard ist "THUMBS")</label>
diff --git a/ext_conf_template.txt b/ext_conf_template.txt
index e73111d28b..0f656dc461 100644
--- a/ext_conf_template.txt
+++ b/ext_conf_template.txt
@@ -12,6 +12,8 @@ caching = 0
 publishNewCollections = 1
 # cat=Basic; type=boolean; label=LLL:EXT:dlf/Resources/Private/Language/Labels.xml:config.unhideOnIndex
 unhideOnIndex = 0
+# cat=Basic; type=string; label=LLL:EXT:dlf/Resources/Private/Language/Labels.xml:config.nonProxyMimeType
+nonProxyMimeType = application/vnd.kitodo.iiif,application/vnd.netfpx,application/vnd.kitodo.zoomify
 # cat=Basic; type=boolean; label=LLL:EXT:dlf/Resources/Private/Language/Labels.xml:config.useExternalApisForMetadata
 useExternalApisForMetadata = 0
 # cat=Files; type=string; label=LLL:EXT:dlf/Resources/Private/Language/Labels.xml:config.fileGrpImages