我在Chrome上使用Selenium，而不是Firefox，但以下功能对我有效：
1.在向下滚动之前捕获页面高度;
1.使用向下键向下滚动;
1.在向下滚动之后捕获页面高度;
1.如果滚动前后页面高度相同，则停止滚动
我的代码如下所示：

import time
from selenium import webdriver
from selenium.webdriver import Chrome
from selenium.webdriver.common.keys import Keys

driver = webdriver.Chrome()
driver.get("www.yourTargetURL.com")

reached_page_end = False
last_height = driver.execute_script("return document.body.scrollHeight")

while not reached_page_end:
      driver.find_element_by_xpath('//body').send_keys(Keys.END)   
      time.sleep(2)
      new_height = driver.execute_script("return document.body.scrollHeight")
      if last_height == new_height:
            reached_page_end = True
      else:
            last_height = new_height

driver.quit()

为了以防万一，如果有人正在使用playwright。这个代码片段与ATJ的答案非常相似。

import time
from playwright.sync_api import sync_playwright

def run(playwright):
    page = playwright.chromium.launch(headless=False).new_page()
    page.goto("URL")

    reached_end = False
    last_height = page.evaluate("() => document.body.scrollHeight")  # scrollHeight: 5879

    while not reached_end:
        page.keyboard.press("End")
        time.sleep(2)

        new_height = page.evaluate("() => document.body.scrollHeight")
        if new_height == last_height:
            reached_end = True
        else:
            last_height = new_height

    page.close()

with sync_playwright() as playwright:
    run(playwright)

我们可以在滚动时使用硬计数器，一旦达到最大计数，我们就退出循环。

b=0;
    boolean x = true;
    while (x){
        WebElement button = null;
        try {
          button = driver.findElement(By.xpath("//*[@id='vjs_video_3']/div[7]/div[1]/button[1]"));
          x= false;
        } catch (Exception ex){
            JavascriptExecutor js = (JavascriptExecutor) driver;
            js.executeScript("javascript:window.scrollBy(50, 80)");
            
            try {
                Thread.sleep(500);
            } catch (InterruptedException e) {
                e.printStackTrace();
            } 
            js.executeScript("javascript:window.scrollBy(50, 50)");  
            b++;
            System.out.println("\n"+ b);
            if(b>50) {
                System.out.println("out!");
                break;
            }

// js.执行脚本（“javascript：窗口.滚动（50，180）”）;//线程休眠（1000）;// js.执行脚本（“javascript：窗口.滚动（50，150）”）;//缺少按钮

}
        

    }
}

您可以在每次滚动尝试之前和之后检查document.body.scrollTop，如果没有要提取的数据，则此值将保持不变

distanceToTop = driver.execute_script("return document.body.scrollTop);")