Manual regression range
Good Build: 55.0.2853.0
Bad Build:  55.0.2854.2

Narrow bisect:
https://chromium.googlesource.com/chromium/src/+log/9773f67d88c0f99b27cc5d2d386870322f692892..08557a213c024dbc17f0f8e62aa31e8bae212711?pretty=fuller&n=30

Suspecting: 417053 ?
Kindly help to re-assign, if your changes are not cause for this issue. 

Note:Issue not seen on Mac & Linux OS.

Deleted: Actual_Apps.mp4 165 KB

	Actual_Apps.mp4 165 KB View Download

Deleted: Expected_Apps.mp4 174 KB

	Expected_Apps.mp4 174 KB View Download

Adding release block label, please undo if not the case.

This is rather frustrating, as it makes it impossible to alter the window opening options of apps on chrome://apps. Is anyone actively working on this?

ah there is a workaround for the chrome://apps issue - if you hold down Ctrl while right clicking, then the app will open in a new window, but the context menu appears, so you can change options.

Yup. I am working on it and here it the patch in the review:
https://codereview.chromium.org/2337513002/

The following revision refers to this bug:
  https://chromium.googlesource.com/chromium/src.git/+/c2f7d5c86864715dc770bbc295a68c6ee7297f38

commit c2f7d5c86864715dc770bbc295a68c6ee7297f38
Author: nzolghadr <nzolghadr@chromium.org>
Date: Wed Sep 21 09:05:47 2016

Only handle click actions for left & middle buttons

Change chrome pages to handle actions for left
and middle button click only.

BUG= 645865 
CQ_INCLUDE_TRYBOTS=master.tryserver.chromium.linux:closure_compilation

Review-Url: https://codereview.chromium.org/2337513002
Cr-Commit-Position: refs/heads/master@{#420011}

[modify] https://crrev.com/c2f7d5c86864715dc770bbc295a68c6ee7297f38/chrome/browser/resources/history/other_devices.js
[modify] https://crrev.com/c2f7d5c86864715dc770bbc295a68c6ee7297f38/chrome/browser/resources/md_downloads/crisper.js
[modify] https://crrev.com/c2f7d5c86864715dc770bbc295a68c6ee7297f38/chrome/browser/resources/ntp4/new_tab.js
[modify] https://crrev.com/c2f7d5c86864715dc770bbc295a68c6ee7297f38/ui/webui/resources/js/util.js

Verified the issue on Windows 10 using chrome dev version #55.0.2868.0 as per the comment #0
Observed that the fix is working as expected.

Attaching screencast for reference

Hence, adding the verified labels.

Deleted: 645865.mp4 416 KB

	645865.mp4 416 KB View Download

Regressed in M-55 and the fix has landed and been verified in M-55 hence marking the issue as Fixed.

Please re-open if there is any further work to be done here.

Thank you!