diff --git a/emain/emain.ts b/emain/emain.ts
index fa44c48de..2152c81bb 100644
--- a/emain/emain.ts
+++ b/emain/emain.ts
@@ -124,7 +124,7 @@ function mainResizeHandler(_: any, win: Electron.BrowserWindow) {
 }
 
 function shNavHandler(event: Electron.Event<Electron.WebContentsWillNavigateEventParams>, url: string) {
-    if (url.startsWith("http://localhost:5173/index.html")) {
+    if (url.startsWith("http://127.0.0.1:5173/index.html")) {
         // this is a dev-mode hot-reload, ignore it
         console.log("allowing hot-reload of index.html");
         return;
@@ -153,7 +153,10 @@ function shFrameNavHandler(event: Electron.Event<Electron.WebContentsWillFrameNa
         electron.shell.openExternal(url);
         return;
     }
-    if (event.frame.name == "pdfview" && url.startsWith("blob:file:///")) {
+    if (
+        event.frame.name == "pdfview" &&
+        (url.startsWith("blob:file:///") || url.startsWith(getBaseHostPort() + "/wave/stream-file?"))
+    ) {
         // allowed
         return;
     }
diff --git a/frontend/app/store/global.ts b/frontend/app/store/global.ts
index 7b408c0ff..61989cfec 100644
--- a/frontend/app/store/global.ts
+++ b/frontend/app/store/global.ts
@@ -148,11 +148,11 @@ function useBlockAtom<T>(blockId: string, name: string, makeFn: () => jotai.Atom
 
 function getBackendHostPort(): string {
     // TODO deal with dev/production
-    return "http://localhost:8190";
+    return "http://127.0.0.1:8190";
 }
 
 function getBackendWSHostPort(): string {
-    return "ws://localhost:8191";
+    return "ws://127.0.0.1:8191";
 }
 
 let globalWS: WSControl = null;
diff --git a/frontend/app/view/preview.tsx b/frontend/app/view/preview.tsx
index 88f2165e1..1b3fdeda3 100644
--- a/frontend/app/view/preview.tsx
+++ b/frontend/app/view/preview.tsx
@@ -76,7 +76,7 @@ function StreamingPreview({ fileInfo }: { fileInfo: FileInfo }) {
     if (fileInfo.mimetype == "application/pdf") {
         return (
             <div className="view-preview view-preview-pdf">
-                <iframe src={streamingUrl} width="100%" height="100%" name="pdfview" />
+                <iframe src={streamingUrl} width="95%" height="95%" name="pdfview" />
             </div>
         );
     }
diff --git a/frontend/app/view/view.less b/frontend/app/view/view.less
index b2048758f..e0536a979 100644
--- a/frontend/app/view/view.less
+++ b/frontend/app/view/view.less
@@ -105,6 +105,7 @@
     overflow: hidden;
     align-items: center;
     justify-content: center;
+    margin: 5px;
 
     &.view-preview-markdown {
         align-items: start;
@@ -143,12 +144,12 @@
     display: flex;
     flex-direction: column;
     width: 100%;
+    overflow: hidden;
 }
 
 .view-nav {
     display: flex;
     padding: 0.2rem 0 0.2rem 0;
-    border-bottom: 1px solid var(--border-color);
 
     .view-nav-item {
         border-radius: 3px;