diff --git a/frontend/src/js/component/wb-collection-content.js b/frontend/src/js/component/wb-collection-content.js
index 8bd1b10..cc14d5c 100644
--- a/frontend/src/js/component/wb-collection-content.js
+++ b/frontend/src/js/component/wb-collection-content.js
@@ -72,11 +72,27 @@ class WBCollectionContent extends Component {
           filesize(item[2]),
           (<div>
             <button class="btn btn-outline-primary mx-1" title="Download"
-              onclick={ () => wbDownloadFile(arvHost, arvToken, manifestReader,
-                '.' + collectionPath + '/' + item[1]) }><i class="fas fa-download"></i></button>
+              onclick={ () => {
+                let prom = wbDownloadFile(arvHost, arvToken, manifestReader,
+                  '.' + collectionPath + '/' + item[1]);
+                prom = prom.then(blocks => {
+                  const blob = new Blob(blocks);
+                  const a = document.createElement('a');
+                  a.name = item[1];
+                  a.href = window.URL.createObjectURL(blob);
+                  a.click();
+                });
+              } }><i class="fas fa-download"></i></button>
+
             <button class="btn btn-outline-primary mx-1" title="View"
-              onclick={ () => wbDownloadFile(arvHost, arvToken, manifestReader,
-                '.' + collectionPath + '/' + item[1]) }><i class="far fa-eye"></i></button>
+              onclick={ () => {
+                let prom = wbDownloadFile(arvHost, arvToken, manifestReader,
+                  '.' + collectionPath + '/' + item[1]);
+                prom = prom.then(blocks => {
+                  const blob = new Blob(blocks);
+                  window.open(window.URL.createObjectURL(blob));
+                });
+              } }><i class="far fa-eye"></i></button>
           </div>)
         ]
       ))
diff --git a/frontend/src/js/deprecated/wb-download-file.js b/frontend/src/js/deprecated/wb-download-file.js
new file mode 100644
index 0000000..c64cfca
--- /dev/null
+++ b/frontend/src/js/deprecated/wb-download-file.js
@@ -0,0 +1,65 @@
+import makeArvadosRequest from 'make-arvados-request';
+
+function rdvHash(serviceId, locator) {
+  let blockHash = /^[0-9a-f]{32}/.exec(locator);
+  if (!blockHash)
+    throw Error('Invalid locator');
+  if (typeof(serviceId) !== 'string')
+    throw Error('Invalid service ID');
+  let res = CryptoJS.MD5(serviceId + blockHash).toString();
+  return res;
+}
+
+function wbDownloadFile(arvHost, arvToken,
+  manifestReader, path) {
+
+  const file = manifestReader.getFile(path);
+  const name = path.split('/').reverse()[0];
+  const blockRefs = file[0];
+  let services;
+
+  let prom = makeArvadosRequest(arvHost, arvToken,
+    '/arvados/v1/keep_services/accessible');
+  prom = prom.then(xhr => (services = xhr.response['items']));
+
+  const blocks = [];
+  for (let i = 0; i < blockRefs.length; i++) {
+    prom = prom.then(() => {
+      const [ locator, position, size ] = blockRefs[i];
+      const weights = services.map(s => rdvHash(s['uuid'], locator));
+      const order = Object.keys(services).sort((a, b) => weights[b].localeCompare(weights[a]));
+      const orderedServices = order.map(i => services[i]);
+
+      let k = 0;
+      const cb = () => {
+        if (k >= orderedServices.length)
+          throw Error('Block not found');
+
+        const svc = orderedServices[k];
+        k++;
+
+        let prom_1 = makeArvadosRequest(svc.service_host +
+          ':' + svc.service_port, arvToken,
+          '/' + locator, { 'useSsl': svc.service_ssl_flag,
+          'responseType': 'arraybuffer' });
+        //prom_1 = prom_1.then(xhr => xhr.response);
+        prom_1 = prom_1.catch(cb);
+
+        return prom_1;
+      };
+
+      return cb().then(xhr => (blocks.append(xhr.response.slice(position, size))));
+    });
+  }
+
+  prom = prom.then(() => {
+    const blob = new Blob(blocks);
+    const url = window.URL.createObjectURL(blob);
+    const a = document.createElement('a');
+    a.href = url;
+    a.download = name;
+
+  });
+}
+
+export default wbDownloadFile;
diff --git a/frontend/src/js/misc/wb-download-file.js b/frontend/src/js/misc/wb-download-file.js
index c64cfca..d479f81 100644
--- a/frontend/src/js/misc/wb-download-file.js
+++ b/frontend/src/js/misc/wb-download-file.js
@@ -1,65 +1,50 @@
 import makeArvadosRequest from 'make-arvados-request';
 
-function rdvHash(serviceId, locator) {
-  let blockHash = /^[0-9a-f]{32}/.exec(locator);
-  if (!blockHash)
-    throw Error('Invalid locator');
-  if (typeof(serviceId) !== 'string')
-    throw Error('Invalid service ID');
-  let res = CryptoJS.MD5(serviceId + blockHash).toString();
-  return res;
-}
-
 function wbDownloadFile(arvHost, arvToken,
   manifestReader, path) {
 
   const file = manifestReader.getFile(path);
   const name = path.split('/').reverse()[0];
   const blockRefs = file[0];
-  let services;
+  let proxy;
 
   let prom = makeArvadosRequest(arvHost, arvToken,
-    '/arvados/v1/keep_services/accessible');
-  prom = prom.then(xhr => (services = xhr.response['items']));
+    '/arvados/v1/keep_services');
+  prom = prom.then(xhr => {
+    const services = xhr.response['items'];
+    const proxies = services.filter(svc => (svc.service_type === 'proxy'));
+    const n = Math.floor(Math.random() * proxies.length);
+    proxy = proxies[n];
+  });
 
   const blocks = [];
   for (let i = 0; i < blockRefs.length; i++) {
-    prom = prom.then(() => {
-      const [ locator, position, size ] = blockRefs[i];
-      const weights = services.map(s => rdvHash(s['uuid'], locator));
-      const order = Object.keys(services).sort((a, b) => weights[b].localeCompare(weights[a]));
-      const orderedServices = order.map(i => services[i]);
-
-      let k = 0;
-      const cb = () => {
-        if (k >= orderedServices.length)
-          throw Error('Block not found');
-
-        const svc = orderedServices[k];
-        k++;
-
-        let prom_1 = makeArvadosRequest(svc.service_host +
-          ':' + svc.service_port, arvToken,
-          '/' + locator, { 'useSsl': svc.service_ssl_flag,
-          'responseType': 'arraybuffer' });
-        //prom_1 = prom_1.then(xhr => xhr.response);
-        prom_1 = prom_1.catch(cb);
-
-        return prom_1;
-      };
-
-      return cb().then(xhr => (blocks.append(xhr.response.slice(position, size))));
-    });
+    const [ locator, position, size ] = blockRefs[i];
+
+    prom = prom.then(() => makeArvadosRequest(
+      proxy.service_host + ':' + proxy.service_port,
+      arvToken,
+      '/' + locator,
+      { 'useSsl': proxy.service_ssl_flag,
+        'responseType': 'arraybuffer' }
+    ));
+
+    prom = prom.then(xhr => (blocks.push(xhr.response.slice(position,
+      position + size))));
   }
 
-  prom = prom.then(() => {
+  prom = prom.then(() => blocks);
+
+  /* prom = prom.then(() => {
     const blob = new Blob(blocks);
     const url = window.URL.createObjectURL(blob);
     const a = document.createElement('a');
     a.href = url;
     a.download = name;
+    a.click();
+  }); */
 
-  });
+  return prom;
 }
 
 export default wbDownloadFile;