我正在研究别人的代码，应该使用硒自动从网页上下载PDF文件，

我一直收到firefox下载确认提示，即使在browser.helperApps.neverAsk.saveToDisk属性中也包含PDF mime类型。

我正在使用Selenium 3.12.0，我将firefox版本从70降级到60.0，但都没有用。我不确定是代码问题还是Selenium firefox兼容问题。

感谢您的帮助。

编辑：这是向下贷款确认弹出窗口的样子。

private static final String mimeTypeToSaveToDisk = "application/pdf;application/zip";

public void download(String url,String downloadDirPath) {          
    // FirefoxProfile           
    FirefoxProfile profile = new FirefoxProfile();
    profile.setacceptUntrustedCertificates(true);
    profile.setassumeUntrustedCertificateIssuer(false);
    profile.setPreference("browser.download.folderList",2);
    profile.setPreference("browser.download.dir",downloadDirPath);     
    profile.setPreference("browser.helperApps.neverAsk.saveToDisk",mimeTypeToSaveToDisk);
    profile.setPreference("browser.helperApps.alwaysAsk.force",false);
    profile.setPreference("browser.download.manager.showWhenStarting",false);
    profile.setPreference("browser.download.manager.closeWhenDone",true);

    // FirefoxOptions
    FirefoxOptions firefoxOptions = new FirefoxOptions();               
    firefoxOptions.setCapability(FirefoxDriver.PROFILE,profile);
    firefoxOptions.setCapability(CapabilityType.accEPT_SSL_CERTS,true);
    // firefoxOptions.setBinary("C:/PathTo/firefox.exe");

    // Proxy
    if(!StringUtil.isnullOrEmpty(EmailProperties.getProxyHost(null))){
        String Proxy_URL = EmailProperties.getProxyHost(null)+":"+ EmailProperties.getProxyPort(null);
        Proxy Proxy = new Proxy();
        Proxy.setHttpProxy(Proxy_URL).setftpProxy(Proxy_URL).setSslProxy(Proxy_URL);
        firefoxOptions.setCapability(CapabilityType.Proxy,Proxy);
    }

    WebDriver driver = new FirefoxDriver(firefoxOptions);
    driver.get(url);

    ExpectedCondition<Boolean> expectedCondition = new ExpectedCondition<Boolean>() {
        @Override
        public Boolean apply(WebDriver driver) {
            return ((JavascriptExecutor) driver).executeScript("return document.readyState").toString().equals("complete");
        }
    };

    try {
        Thread.sleep(timeSleep * 1000);
        WebDriverWait wait = new WebDriverWait(driver,timeOut);
        wait.until(expectedCondition);
    } catch (Throwable e) {
        logger.error("Timeout waiting for Page Load Request to complete.",e);
    }

    By by = By.xpath("//a[starts-with(@id,'file_')]");
    List<WebElement> elements = driver.findElements(by);
    for (int Counter = 0; Counter < elements.size(); Counter++) {
        elements.get(Counter).click();
    }

    try {
        File downloadFile [] = null;
        int nbSleep = 0;
        while(nbSleep <= 10 && (downloadFile == null || downloadFile.length>0)){
            logger.debug("Téléchargement ZIP non finalisé,on attend "+((nbSleep+1)*timeSleep * 1000)+" secondes ...");
            Thread.sleep(timeSleep * 1000);
            nbSleep++;              
            downloadFile = new File(downloadDirPath).listFiles(
                    new FilenameFilter(){           
                        @Override
                        public boolean accept(File dir,String name) {
                            return name.endsWith(".part");
                        }
                    }
                );
        }

        if(downloadFile == null || downloadFile.length>0){
            logger.error("Téléchargement ZIP non finalisé après attente de "+((nbSleep+1)*timeSleep * 1000)+" secondes ...");
        }
    } catch (Throwable e) {
        logger.error("Timeout waiting for Page Load Request to complete.",e);
    }
    driver.quit();
}