Since we want to remove support for Selenium-styled new session requests before releasing geckodriver 1.0, we could could ease the transition for users by issuing a warning when users attempt to use desiredCapabilities or requiredCapabilities. If we wanted to be really nice we could write some documentation on how to upgrade from desiredCapabilities/requiredCapabilities to the WebDriver conforming new session negotiation pattern.

This emits a warning when the webdriver library reverts to using the legacy Selenium-styled capabilities negotiation for new sessions. It provides a helpful link which will explain to users how to update.

Comment on attachment 9013351 [details] bug 1495475: webdriver: warn on using desiredCapabilities/requiredCapabilities Henrik Skupin (:whimboo) has approved the revision.

Pushed by hskupin@mozilla.com: https://hg.mozilla.org/integration/autoland/rev/549b5d7a277b webdriver: warn on using desiredCapabilities/requiredCapabilities r=whimboo