1 files changed, 6 insertions, 3 deletions
diff --git a/devtools/client/shared/components/menu/MenuButton.js b/devtools/client/shared/components/menu/MenuButton.js
index 3367987c3c..4a3b1e5c48 100644
--- a/devtools/client/shared/components/menu/MenuButton.js
+++ b/devtools/client/shared/components/menu/MenuButton.js
@@ -427,9 +427,12 @@ class MenuButton extends PureComponent {
       buttonProps.className = buttonProps.className
         ? `${buttonProps.className} ${iconClass}`
         : iconClass;
-      buttonProps.style = {
-        "--menuitem-icon-image": "url(" + this.props.icon + ")",
-      };
+      // `icon` may be a boolean and the icon URL will be set in CSS.
+      if (typeof this.props.icon == "string") {
+        buttonProps.style = {
+          "--menuitem-icon-image": "url(" + this.props.icon + ")",
+        };
+      }
     }
 
     if (this.state.isMenuInitialized) {