How to accept or deny JavaScript confirmation dialogs in Capybara/Selenium

These methods are available to you:

page.driver.browser.switch_to.alert.accept
page.driver.browser.switch_to.alert.dismiss
page.driver.browser.switch_to.alert.text # the confirmation text

Spreewald Show archive.org snapshot gives you steps like these:

When I confirm the browser dialog
When I cancel the browser dialog

Note that recent versions of Selenium will automatically dismiss confirmation dialogs. Here is how to fix that.

Also see Type text into Javascript prompt dialogs in Capybara/Selenium.