diff --git a/themes/shared/browser-shared.css b/themes/shared/browser-shared.css
index 6ace391527..03e8bbbb92 100644
--- a/themes/shared/browser-shared.css
+++ b/themes/shared/browser-shared.css
@@ -77,8 +77,8 @@ body {
     height: 100%;
     margin: 0;
     padding: 0;
-    min-height: 0;
-    min-width: 0;
+    min-width: 400px;
+    min-height: 250px;
 }
 
 #mount {