When using the Developer Tools, there is a "What's new" tab at the bottom, beside the console. This section displays a big banner regarding changes to the developer tools, and also links to a Google URL.
Steps to reproduce:
Open with the "Inspect element" shortcut, or just find "Developer tools"
Big banner regarding Chrome. Opens URL about Google Chrome
No banner or Opera banner. Or I guess Chromium banner? Not Google Chrome...
Tried on Windows, can probably be reproduced on other OS's
Seen on whatever version after 46.0.XXXX.XXXXX
Here's the linked Google URL: https://developers.google.com/web/updates/2017/04/devtools-release-notes
Also noticed that "Release Notes" and "Help" section in "Developer Tools" both link to Google Chrome URLs