ChromeDriver update: onbeforeunload is not fired any more si

ChromeDriver update: onbeforeunload is not fired any more since 126.0.6465.0

Since version 126.0.6465.0 ChromeDriver behaves according to W3C standard. Specifically:

Whenever active sessions is a list containing exactly one item, and that item is a HTTP session, but is not a BiDi session, then in the steps to fire beforeunload, implementations must act as if showing an unload prompt is likely to be annoying, deceptive, or pointless. This means that beforeunload prompts are never shown when there's an active HTTP-only session.

This change was implemented by the following commit:

https://chromium.googlesource.com/chromium/src/+/5b3168e8f8c4487320c654dd761622b89d548514

https://chromium-review.googlesource.com/c/chromium/src/+/5517510

Ignore beforeunload dialogs

According to WebDriver standard the alerts arising on beforeunload event
must never be shown in Classic session. This commit implements
autoacceptance of any beforeunload alerts.

It fixes the following bug:

https://issues.chromium.org/issues/42323796

To figure out in which release of ChromeDriver this commit was included you may use two methods:

#1 Append chrome/VERSION to the commit URL and open it in a browser

https://chromium.googlesource.com/chromium/src/+/5b3168e8f8c4487320c654dd761622b89d548514/chrome/VERSION

It will display the version information