Update src/containers/extension-library.jsx

src/containers/extension-library.jsx

@@ -143,9 +143,9 @@ class ExtensionLibrary extends React.PureComponent {
 
     async handleItemSelect(item) {
         // eslint-disable-next-line no-alert
-        // if (item.incompatibleWithScratch && !confirm(this.props.intl.formatMessage(messages.incompatible))) {
-        //     return;
-        // }
+        if (item.extensionWarningOnImport && !confirm(this.props.intl.formatMessage(messages.extensionWarning))) {
+            return;
+        }
         // const id = item.extensionId;
         // let url = item.extensionURL ? item.extensionURL : id;
         // const isCustomURL = !item.disabled && !id;