diff --git a/web/debugger.css b/web/debugger.css
index 4de0814ab..9a7233b49 100644
--- a/web/debugger.css
+++ b/web/debugger.css
@@ -13,6 +13,12 @@
  * limitations under the License.
  */
 
+#PDFBug,
+#PDFBug input,
+#PDFBug button,
+#PDFBug select {
+  font: message-box;
+}
 #PDFBug {
   background-color: rgba(255, 255, 255, 1);
   border: 1px solid rgba(102, 102, 102, 1);