diff --git a/chrome/navbar_below_content.css b/chrome/navbar_below_content.css
index 6f97343..7f41c11 100644
--- a/chrome/navbar_below_content.css
+++ b/chrome/navbar_below_content.css
@@ -24,9 +24,11 @@ See the above repository for updates as well as full license text. */
     width: 100%;
     z-index: 1;
   }
-
   #nav-bar-customization-target{ -webkit-box-flex: 1; }
 
+  /* Fix panels sizing */
+  .panel-viewstack{ max-height: unset !important; }
+
   #urlbar[breakout][breakout-extend]{
     display: flex !important;
     flex-direction: column-reverse;
diff --git a/chrome/toolbars_below_content.css b/chrome/toolbars_below_content.css
index d1d6a51..c9d1f98 100644
--- a/chrome/toolbars_below_content.css
+++ b/chrome/toolbars_below_content.css
@@ -39,6 +39,9 @@ See the above repository for updates as well as full license text. */
   #TabsToolbar > .titlebar-buttonbox-container{ display: none }
   #toolbar-menubar > .titlebar-buttonbox-container{ order: 1000 }
 
+  /* Fix panels sizing */
+  .panel-viewstack{ max-height: unset !important; }
+
   /* Fullscreen mode support */
   #navigator-toolbox[inFullscreen]{ margin-top: 0 !important }
   #navigator-toolbox[inFullscreen][style*="margin-top"]{ visibility: collapse }