diff --git a/src/frontend/apps/impress/src/features/docs/doc-editor/hook/useSaveDoc.tsx b/src/frontend/apps/impress/src/features/docs/doc-editor/hook/useSaveDoc.tsx
index 0a21cd45..ca1ed005 100644
--- a/src/frontend/apps/impress/src/features/docs/doc-editor/hook/useSaveDoc.tsx
+++ b/src/frontend/apps/impress/src/features/docs/doc-editor/hook/useSaveDoc.tsx
@@ -4,6 +4,7 @@ import * as Y from 'yjs';
 
 import { useUpdateDoc } from '@/features/docs/doc-management/';
 import { KEY_LIST_DOC_VERSIONS } from '@/features/docs/doc-versioning';
+import { isFirefox } from '@/utils/userAgent';
 
 import { toBase64 } from '../utils';
 
@@ -87,10 +88,7 @@ const useSaveDoc = (docId: string, doc: Y.Doc, canSave: boolean) => {
        * if he wants to leave the page, by adding the popup, we let the time to the
        * request to be sent, and intercepted by the service worker (for the offline part).
        */
-      const isFirefox =
-        navigator.userAgent.toLowerCase().indexOf('firefox') > -1;
-
-      if (typeof e !== 'undefined' && e.preventDefault && isFirefox) {
+      if (typeof e !== 'undefined' && e.preventDefault && isFirefox()) {
         e.preventDefault();
       }
     };
diff --git a/src/frontend/apps/impress/src/utils/index.ts b/src/frontend/apps/impress/src/utils/index.ts
index 559df58c..4f823731 100644
--- a/src/frontend/apps/impress/src/utils/index.ts
+++ b/src/frontend/apps/impress/src/utils/index.ts
@@ -1,2 +1,4 @@
+export * from './userAgent';
 export * from './string';
+export * from './styleBuilder';
 export * from './system';
diff --git a/src/frontend/apps/impress/src/utils/userAgent.ts b/src/frontend/apps/impress/src/utils/userAgent.ts
new file mode 100644
index 00000000..fa30acf2
--- /dev/null
+++ b/src/frontend/apps/impress/src/utils/userAgent.ts
@@ -0,0 +1,2 @@
+export const isFirefox = () =>
+  navigator.userAgent.toLowerCase().indexOf('firefox') > -1;