How to use the @capacitor/core.Plugins.Browser function in @capacitor/core

constructor(public navCtrl: NavController, public navParams: NavParams) {
    Plugins.Browser.addListener('browserFinished', (info: any) => {
      console.log('Browser all done!');
    });
    Plugins.Browser.addListener('browserPageLoaded', (info: any) => {
      console.log('Browser page loaded!');
    });
    Plugins.Browser.prefetch({
      urls: ["https://ionicframework.com/"]
    });
  }

browserOpen() {
    Plugins.Browser.open({
      url: 'https://ionicframework.com',
      toolbarColor: "#5A5DF5"
    });

    setTimeout(() => {
      Plugins.Browser.close();
    }, 5000);
  }

openInBrowser(url: string): Promise {
    return Plugins.Browser.open({ url, toolbarColor: '#1e2023' });
  }

setTimeout(() => {
      Plugins.Browser.close();
    }, 5000);
  }

async openWiki(): Promise {
    const url = `https://oldschool.runescape.wiki/w/${this.item.name}`;
    Plugins.Browser.open({ url, toolbarColor: '#1e2023' });
  }

el.onclick = (event: Event) => {
        event.preventDefault();
        Plugins.Browser.open({ url: el.href, toolbarColor: '#1e2023' });
      };
    });

async openInBrowser(url: string): Promise {
    Plugins.Browser.open({ url, toolbarColor: '#1e2023' });
  }
}