Develop Reference

Can Playwright be used to launch a browser instance

I'm finding that in some cases web pages are being rendered in one browser materially different than another browser. Specifically, Playwright running webkit is rendering a different structure than what I see when viewing the page in a standalone Chrome browser. No clue why and I can't do anything about it. This isn't a Playwright issue, it is rendering it the same way as a standalone browser would. Problem is I don't know of an up-to-date webkit based browser for Windows.
Is there a way using just Playwright to open a browser window that will let me manually enter a url and inspect the page as Playwright renders it?

You can use Playwright's codegen tool and open the webkit browser
playwright codegen -b webkit

In playwright.config you have option
channnel: "chrome"
So with this you will start chrome, not chromium driver.

You can also use the following command to launch a webkit browser with a desktop safari user agent:
npx playwright codegen -b webkit --device "Desktop Safari"

How to scrape without web browser driver?

I made a web scrape program using selenium.
This program is access target URL and download a file.
After updating Chrome, program does not work because chromedriver is old version.
How to do web scraping and file download not use chromedriver?
Thank all for reading.

I think it would be easier if you also updated ChromeDriver, that way your program would work again. Or you could install the previous Chrome version again.
But if you don't want that, you can use GeckoDriver with Firefox.

You can use a headless scrapper like Pupeppeteer. You also can update your Chrome driver to be compatible with your browser version that is the most recomended.

What modules are best to imitate selenium style of being able to login into accounts and place orders? Without opening web browser [duplicate]

I have been trying to do web automation using Selenium. Is there any way to use a browser like Chrome or Firefox without actually installing them, like using some alternate options, or having portable versions of them. If I can use portable versions how do I tell Selenium to use it?

To use the browsers like google-chrome and firefox you have to install the full-blown browser.
You can find a detailed discussion in Is Chrome installation needed or only chromedriver when using Selenium?
As an alternative you can use the headless phantomjs browser as follows:
Code Block:
from selenium import webdriver
driver = webdriver.PhantomJS(executable_path=r'C:\WebDrivers\phantomjs.exe', service_args=['--ignore-ssl-errors=true', '--ssl-protocol=tslv1.0'])
driver.set_window_size(1920, 1080)
driver.get("https://account.booking.com/register?op_token=EgVvYXV0aCJ7ChQ2Wjcyb0hPZDM2Tm43emszcGlyaBIJYXV0aG9yaXplGhpodHRwczovL2FkbWluLmJvb2tpbmcuY29tLyo2eyJwYWdlIjoiL3JlZGlyZWN0LXRvLWpvaW5hcHAtbHA_bGFuZz1pdCZhaWQ9MTE4NzM2MCJ9QgRjb2RlKg4QAToAQgBY5dGK8gVgAQ")
print(driver.page_source)
driver.quit()
You can find a detailed discussion in PhantomJS can't load correctly web page
References
A couple of relevent discussions:
Do headless web browser need selenium WebDriver?
Difference of Headless browsers for automation

Install Selenium typing pip install selenium.
It comes with a portable version of Chrome browser, no need to manually install any browser for this.
Chrome will show this message to indicate that it is being 'remote controlled:
"Chrome is controlled by automated test software"

Why local chrome-urls like: chrome://downloads or chrome://apps doesn't work in headless mode?

I am trying to visit chrome local urls. But it's not working. Does headless chrome support local urls?

I was looking for exactly this just today.
Found this:
Most chrome internal pages are not implemented in headless mode. This is a limitation of headless Chrome itself, and is not related to ChromeDriver. If you need a particular internal page available in headless Chrome, please file a feature request at https://crbug.com/.
:(
source

Selenium Chrome Extension Interaction

I can load a Selenium Chromedriver extension in python. But I need to login in this extension in order to be able to use it. My question is how can I interact with this extension in order to login within it? The extension namely is the "Hoxx VPN".
Until I have the following code:
chop = webdriver.ChromeOptions()
chop.add_extension("D:/01_PhD/Fogadas/chromeextension/2.2.2_0.crx")
driver = webdriver.Chrome(chrome_options=chop)

Selenium Webdriver can interact with web pages only. Previously I have also tried it but unable to succeed.
See this as reference:
https://github.com/seleniumhq/selenium-google-code-issue-archive/issues/7805

You can use the Opera Webbrowser it's latest version i.e. 70+ having the in-built vpn which can be activated easily by selenium
Github have the required code to operate opera using selenium