Chrome Version       : 62.0.3178.0
OS Version: 10.0

I'm investigating to see if Windows is afflicted similar to Mac wrt https://chromium-review.googlesource.com/c/588808 and announcing things multiple times. It seems to be pretty good in Canary.

Permission bubbles seem to navigate just fine. (Note they don't announce the way they do on ChromeOS and Mac. VoiceOver on Mac automatically announces window titles when focus shifts to a new Window. ChromeVox on ChromeOS got a fix to announce them in   Issue 474622 , but that was never implemented on Windows). But I don't see anything weird when navigating around.

Narrator reads things out as I'd expect whether the cursor movement is "Advanced" or "Normal"

An example of possible duplication I saw was on the bookmarks bubble, and only when cursor movement mode was "Advanced". It looks like there are two levels -- one for the client view, and one for the "pane" / window. You can navigate between them with Caps+Up/Down. This is similar to  Issue 741285 , which was worse on Mac. But the patch I landed there in m61 doesn't seem to affect Windows positively or negatively (compared m59 stable and Canary 62.0.3178.0)

The duplication can be seen in the attachments, but it doesn't seem to impact things negatively.
 

Deleted: narrator_client_view.png 7.5 KB

	narrator_client_view.png 7.5 KB View Download

Deleted: narrator_bookmarks_pane.png 8.3 KB

	narrator_bookmarks_pane.png 8.3 KB View Download