--- a/devtools/client/jsonview/css/main.css
+++ b/devtools/client/jsonview/css/main.css
@@ -17,16 +17,17 @@
 
 /******************************************************************************/
 /* Panel Content */
 
 .panelContent {
   overflow-y: auto;
   font-size: 11px;
   font-family: var(--monospace-font-family);
+  padding-right: 5px;
 }
 
 /* The tree takes the entire horizontal space within the panel content. */
 .panelContent .treeTable {
   width: 100%;
 }
 
 /* Make sure there is a little space between label and value columns. */