问Selenium如何在启动浏览器后按下两个不同的键组合

EN

    const webdriver = require('selenium-webdriver');
    
    const Keys = webdriver.Key
    const By = webdriver.By
    
    const driver = new webdriver.Builder().
       withCapabilities(webdriver.Capabilities.firefox()).
       build();
    
       
    driver.get('https://example.com');
    
    //this element is supposed to be some almost root container, but ideally i dont want to select anything, just press the keys.
    
    driver.findElement(By.id('canvas-container')).sendKeys('webdriver', Keys.CTRL + Keys.F5);
driver.findElement(By.id('canvas-container')).sendKeys('webdriver', Keys.CTRL + Keys.F5);
//wait 2-5 sec
driver.findElement(By.id('canvas-container')).sendKeys('webdriver', Keys.CTRL + Keys.SHIFT + Keys.C);