我刚刚找到了答案：
我还需要设置以下内容，它可以工作：browser.new_context(no_viewport=True)

您可以创建一个conftest.py并定义：

def page(playwright: Playwright, scope="module"):
    app_data_path = os.getenv("LOCALAPPDATA")
    chromium_path = "ms-playwright\\chromium-1028\\chrome-win"
    chromium_path = os.path.join(app_data_path, chromium_path)
    chrome = playwright.chromium\
        .launch_persistent_context(chromium_path, headless=False, args=["--start-maximised"], no_viewport=True)
    page = chrome.new_page()
    return page

然后，将能够手动最大化窗口，不会恢复回来

我使用playwright和pytest-playwright。

def test_foo(playwright):
    browser = playwright.chromium.launch(headless=False, args=["--start-maximized"])
    # create a new incognito browser context.
    context = browser.new_context(no_viewport=True)
    # create a new page in a pristine context.
    page = context.new_page()
    page.goto("https://example.com")

使用pytest .运行测试，无需指定浏览器和headless参数。使用new_context，它不会与其他浏览器上下文共享cookie/缓存，因此我们可以分离测试运行