diff --git a/public/assets/model/config.js b/public/assets/model/config.js
index a5819524..6bce78f3 100644
--- a/public/assets/model/config.js
+++ b/public/assets/model/config.js
@@ -23,7 +23,7 @@ export function get(key, defaultValue) {
 }
 
 export function getVersion() {
-    return get("version", "na");
+    return get("version", "");
 }
 
 export function query() {
diff --git a/public/assets/pages/filespage/ctrl_upload.js b/public/assets/pages/filespage/ctrl_upload.js
index 9792af35..610478a8 100644
--- a/public/assets/pages/filespage/ctrl_upload.js
+++ b/public/assets/pages/filespage/ctrl_upload.js
@@ -3,10 +3,11 @@ import { toHref } from "../../lib/skeleton/router.js";
 import rxjs, { effect, onClick } from "../../lib/rx.js";
 import { forwardURLParams } from "../../lib/path.js";
 import { animate, slideYOut } from "../../lib/animate.js";
-import { loadCSS } from "../../helpers/loader.js";
 import { qs, qsa } from "../../lib/dom.js";
 import { AjaxError } from "../../lib/error.js";
 import assert from "../../lib/assert.js";
+import { get as getConfig } from "../../model/config.js";
+import { loadCSS } from "../../helpers/loader.js";
 import { currentPath, isNativeFileUpload } from "./helper.js";
 import { getPermission, calculatePermission } from "./model_acl.js";
 import { mkdir, save } from "./model_virtual_layer.js";
@@ -358,7 +359,7 @@ function workerImplFile({ progress, speed }) {
         }
 
         async prepareJob({ file, path, virtual }) {
-            const chunkSize = (window.CONFIG["upload_chunk_size"] || 0) *1024*1024;
+            const chunkSize = getConfig("upload_chunk_size", 0) *1024*1024;
             const numberOfChunks = Math.ceil(file.size / chunkSize);
             const headersNoCache = {
                 "Cache-Control": "no-store",
diff --git a/public/assets/pages/filespage/thing.js b/public/assets/pages/filespage/thing.js
index 5e9ea179..d985b12e 100644
--- a/public/assets/pages/filespage/thing.js
+++ b/public/assets/pages/filespage/thing.js
@@ -1,6 +1,7 @@
 import { createElement } from "../../lib/skeleton/index.js";
 import { animate, opacityOut, opacityIn } from "../../lib/animate.js";
 import assert from "../../lib/assert.js";
+import { get as getConfig } from "../../model/config.js";
 
 import { extractPath, isDir, isNativeFileUpload } from "./helper.js";
 import { files$ } from "./ctrl_filesystem.js";
@@ -24,11 +25,12 @@ const IMAGE = {
 let TYPES = null;
 export function init() {
     TYPES = {
-        MIME: window.CONFIG.mime,
+        MIME: getConfig("mime", {}),
         THUMBNAILER: (function() {
             const set = new Set();
-            for (let i=0; i<window.CONFIG.thumbnailer.length; i++) {
-                set.add(window.CONFIG.thumbnailer[i]);
+            const thumbnailers = getConfig("thumbnailer");
+            for (let i=0; i<thumbnailers.length; i++) {
+                set.add(thumbnailers[i]);
             }
             return set;
         })(),
diff --git a/public/assets/pages/viewerpage/application_editor.js b/public/assets/pages/viewerpage/application_editor.js
index 037bff58..3d1e96fc 100644
--- a/public/assets/pages/viewerpage/application_editor.js
+++ b/public/assets/pages/viewerpage/application_editor.js
@@ -2,6 +2,7 @@ import { createElement, onDestroy } from "../../lib/skeleton/index.js";
 import rxjs, { effect } from "../../lib/rx.js";
 import { animate, slideXIn, opacityOut } from "../../lib/animate.js";
 import { qs } from "../../lib/dom.js";
+import { get as getConfig } from "../../model/config.js";
 import { createLoader } from "../../components/loader.js";
 import { createModal, MODAL_RIGHT_BUTTON } from "../../components/modal.js";
 import { loadCSS, loadJS } from "../../helpers/loader.js";
@@ -65,7 +66,7 @@ export default async function(render, { acl$, getFilename, getDownloadUrl }) {
                 }),
             );
             return rxjs.of(content).pipe(
-                rxjs.mergeMap((content) => rxjs.of(window.CONFIG).pipe(
+                rxjs.mergeMap((content) => rxjs.of(getConfig()).pipe(
                     rxjs.mergeMap((config) => rxjs.from(loadKeybinding(config.editor)).pipe(rxjs.mapTo(config))),
                     rxjs.map((config) => [content, config]),
                     rxjs.mergeMap((arr) => rxjs.from(loadMode(extname(getFilename()))).pipe(
diff --git a/public/assets/pages/viewerpage/application_image.js b/public/assets/pages/viewerpage/application_image.js
index e3e47b66..5936ad2e 100644
--- a/public/assets/pages/viewerpage/application_image.js
+++ b/public/assets/pages/viewerpage/application_image.js
@@ -3,13 +3,14 @@ import { toHref } from "../../lib/skeleton/router.js";
 import rxjs, { effect, onLoad, onClick } from "../../lib/rx.js";
 import { animate } from "../../lib/animate.js";
 import { extname } from "../../lib/path.js";
-import { loadCSS } from "../../helpers/loader.js";
 import { qs } from "../../lib/dom.js";
+import { get as getConfig } from "../../model/config.js";
+import { Chromecast } from "../../model/chromecast.js";
+import { loadCSS } from "../../helpers/loader.js";
 import { createLoader } from "../../components/loader.js";
 import notification from "../../components/notification.js";
 import t from "../../locales/index.js";
 import ctrlError from "../ctrl_error.js";
-import { Chromecast } from "../../model/chromecast.js";
 
 import { transition } from "./common.js";
 
@@ -129,7 +130,7 @@ function buttonChromecast(filename, downloadURL) {
         const link = Chromecast.createLink("/" + toHref(downloadURL));
         const media = new window.chrome.cast.media.MediaInfo(
             link,
-            window.CONFIG.mime[extname(filename)],
+            getConfig("mime", {})[extname(filename)],
         );
         media.metadata = new window.chrome.cast.media.PhotoMediaMetadata();
         media.metadata.title = filename;