Updating the user agent of GooglebotGooglebot uses a Chrome-based browser to render webpages, as we announced at Google I/O earlier this year. As part of this, in December 2019 we'll update Googlebot's user agent strings to reflect the new browser version, and periodically update the version numbers to match Chrome updates in Googlebot.
Wednesday, October 02, 2019
There is information about the new evergreen Googlebot and its user agent in this article.