diff --git a/src/app/appmarket/appdetails/appdetails.component.css b/src/app/appmarket/appdetails/appdetails.component.css
index 58f40a3..463297b 100644
--- a/src/app/appmarket/appdetails/appdetails.component.css
+++ b/src/app/appmarket/appdetails/appdetails.component.css
@@ -42,3 +42,8 @@ hr{
     cursor: default!important;
     color: gray;
 }
+
+.thumbnail{
+    border: none;
+    box-shadow: none;
+}
diff --git a/src/app/appmarket/appmanagement/app-preview/apppreview.component.css b/src/app/appmarket/appmanagement/app-preview/apppreview.component.css
index c6f752c..48d5624 100644
--- a/src/app/appmarket/appmanagement/app-preview/apppreview.component.css
+++ b/src/app/appmarket/appmanagement/app-preview/apppreview.component.css
@@ -119,3 +119,7 @@ hr{
 .bs-callout-info h4 {
     color: #5bc0de;
 }
+.thumbnail{
+    border: none;
+    box-shadow: none;
+}
diff --git a/src/app/shared/navbar/navbar.component.html b/src/app/shared/navbar/navbar.component.html
index d25efed..3fb2b92 100644
--- a/src/app/shared/navbar/navbar.component.html
+++ b/src/app/shared/navbar/navbar.component.html
@@ -113,7 +113,7 @@
                         {{ 'NAVBAR.LOGIN_REGISTER' | translate }}
                     </button>
                 </li>
-                <li>
+                <li *ngIf="isServiceAvailable">
                     <button *ngIf="router.url != '/about'" class="btn navbar-btn" [routerLink]="['/about']">
                         {{ 'NAVBAR.ABOUT' | translate }}
                     </button>
@@ -122,7 +122,7 @@
                         {{ 'NAVBAR.BACK' | translate }}
                     </button>
                 </li>
-                <li class="dropdown">
+                <li *ngIf="isServiceAvailable" class="dropdown">
                     <a style="display: inline-block" class="dropdown-toggle dropdown-lang" aria-expanded="false"
                        aria-haspopup="true" data-toggle="dropdown" href="#" role="button">
                         <img alt="language" class="lang-circle-icon" src="{{[getPathToCurrent()]}}"/>
diff --git a/src/app/shared/navbar/navbar.component.ts b/src/app/shared/navbar/navbar.component.ts
index b3ab2e0..394fcdf 100644
--- a/src/app/shared/navbar/navbar.component.ts
+++ b/src/app/shared/navbar/navbar.component.ts
@@ -8,6 +8,7 @@ import {InternationalizationService} from '../../service/internationalization.se
 import {ModalNotificationSendComponent} from '../modal/modal-notification-send/modal-notification-send.component';
 import {DatePipe} from '@angular/common';
 import {UserDataService} from '../../service/userdata.service';
+import {ServiceUnavailableService} from '../../service-unavailable/service-unavailable.service';
 
 @Component({
     selector: 'app-navbar',
@@ -36,7 +37,8 @@ export class NavbarComponent implements OnInit {
                 private datePipe: DatePipe,
                 private languageService: InternationalizationService,
                 private domainService: DomainService,
-                private userDataService: UserDataService) {
+                private userDataService: UserDataService,
+                private serviceAvailability: ServiceUnavailableService) {
     }
 
     useLanguage(language: string) {
@@ -52,6 +54,7 @@ export class NavbarComponent implements OnInit {
     }
 
     ngOnInit() {
+        this.isServiceAvailable = this.serviceAvailability.isServiceAvailable;
         this.getSupportedLanguages();
         if (this.authService.isLogged()) {
             if (this.authService.hasRole('ROLE_SYSTEM_ADMIN')) {