diff --git a/addon/chrome/content/styles/templatePicker.css b/addon/chrome/content/styles/templatePicker.css
index 44d16b1..4b0d777 100644
--- a/addon/chrome/content/styles/templatePicker.css
+++ b/addon/chrome/content/styles/templatePicker.css
@@ -5,6 +5,7 @@ dialog {
 
 .viewport-container {
   -moz-window-dragging: no-drag;
+  height: 100%;
 }
 
 .viewport {
@@ -17,3 +18,7 @@ dialog {
   overflow: auto;
   background: var(--material-background);
 }
+
+.virtualized-table {
+  height: 100%;
+}