Selenium: unknown error: failed to wait for extension background page to load

[cheerayhuang]

Meta -

OS:
Ubuntu 14.04, kernel 3.19.0

Selenium Version:

3.6.0

Browser:
Chromium Browser, Chrome Driver 2.31 and 2.33 (both are tested for this issue)

Browser Version:

60.0.3112.78

Expected Behavior -

Create and return WebDriver normally.

Actual Behavior -

Throw an exception as bellow:

selenium.common.exceptions.WebDriverException: Message: unknown error: failed to wait for extension background page to load: chrome-extension://dnpjjfhimhgghciignhbkdgllkplgkii/_generated_background_page.html 
from unknown error: page could not be found: chrome-extension://dnpjjfhimhgghciignhbkdgllkplgkii/_generated_background_page.html
  (Driver info: chromedriver=2.31.488763 (092de99f48a300323ecf8c2a4e2e7cab51de5ba8),platform=Linux 3.19.0-32-generic x86_64)

Steps to reproduce -

```Python

         chrome_options = webdriver.ChromeOptions()

         chrome_options.add_extension(self.get_chrome_proxy_extension(proxy=self.proxy))

         chrome_options.add_argument('user-agent={0}'.format(user_agent))

         chrome_options.add_argument('headless')

         return webdriver.Chrome(chrome_options = chrome_options)

````

As above, when I load an extension via ChromeOptions and add the "headless" argument, the ChromeDriver will give me an exception.

But if I just add the argument "headless" into ChromeDriver, everything is OK. And also just loading an extension via ChromeOptions is OK.

this issue is a little like #3508 , but this is not caused by method "getSize()" or "maximize()".

[barancev]

1) Latest chromedriver is 2.33 at the moment, try to upgrade.
2) chromedriver issues should be reported to https://bugs.chromium.org/p/chromedriver/issues/list

[bearnxx]

did you solve the problem？

[hey1937]

selenium.common.exceptions.WebDriverException: Message: unknown error: failed to wait for extension background page to load: chrome-extension://kbjodoffbgbkdenmeklfhafmlkalclja/_generated_background_page.html
from unknown error: page could not be found: chrome-extension://kbjodoffbgbkdenmeklfhafmlkalclja/_generated_background_page.html

---

this is my mistake? don,t tell me try to upgrade chromedriver

[cgoldberg]

this is my mistake?

How would we know? You hijacked a closed issue and added no information about what you are attempting. Please submit a new issue and fill out the issue template.