message: Work for - Version 0.12.33 not working firefox 56
diff: @@ -39,6 +39,8 @@ export class StylesManager {
  }
  public initializeStyles() {
  - Object.keys(StylesManager.Styles).forEach(selector => this.sheet.addRule(selector, StylesManager.Styles[selector]));
  + Object.keys(StylesManager.Styles).forEach(selector =>
  + this.sheet.insertRule(selector + '{ ' + StylesManager.Styles[selector] + ' }', 0
  + ));
  }
  }
  