Case insensitive modifier for Firefox (#15831)

JSON.parse: unexpected character at line 1 column 1 of the JSON data

JSON.parse: unexpected end of data at line 1 column 1 of the JSON data

ui/pages/settings/advanced-tab/advanced-tab.component.js

@@ -166,7 +166,7 @@ export default class AdvancedTab extends PureComponent {
         restoreMessage: null,
       });
     } catch (e) {
-      if (e.message.match(/Unexpected.+JSON/u)) {
+      if (e.message.match(/Unexpected.+JSON/iu)) {
         this.setState({
           showResultMessage: true,
           restoreSuccessful: false,