Thanks for filing this feedback.

You should be getting these only once every 6 weeks, which isn't too bad, IMO.

But maybe there are ways we could make sure it is less intrusive... if it's ignored for a few opens/hours we auto-dismiss it.  Or other ideas like that?
Would prefer to explore that before we give the power to ignore all future ones forever.

I could add a checkbox in DevTools' settings to ignore all future what's new updates.

I'm a bit hesitant on adding a heuristic for auto-dismiss - there doesn't seem to be a precedent for this in our UI and I don't know what would be an appropriate amount of time to auto-dismiss (e.g. wait 1 hour or 6 hours before dismissing from the drawer?) given the lack of UMA data on how long 'What's new' is visible to users.

Was just about to file a bug for this. It's quite invasive and routinely gets in the way.

Adding a check-box to the bottom of it or a "never show again" button would be great.
Another option might be to never show it by default and instead show a little (i) indicator in the toolbar like we do for chrome updates.

Thanks.

Fixed in linked bug. If you go to DevTools settings, you can opt-out by unchecking "Show What's New after each update".

Awesome, thank you! 

Does this setting get saved in anyway to Chrome profile or does it require setting for each browser instance?

@mattgaunt: i think this setting is browser-wide.