Able to reproduce the issue on latest Chrome stable i.e., 61.0.3163.79 on Windows 7,10 and Linux, Mac I wasn't able to reproduce and this is a regression which started in M61.

Bisecting currently will update the bug soon.

Please find the closest bisect which I can get for this bug :

bisect range :
You are probably looking for a change made after 61.0.3163.72 (known good), but
no later than 61.0.3163.73 (first known bad).
CHANGELOG URL:
https://chromium.googlesource.com/chromium/src/+log/61.0.3163.72..61.0.3163.73?pretty=full


Suspecting Cl : https://chromium.googlesource.com/chromium/src/+/107fb0be3669e6f024cae6c016c75faf0acc154a or 
                https://chromium.googlesource.com/chromium/src/+/d3d54df24c0859b0b2356055f65359d97d1b98c8 


Note : Both are w.r.t ChromeOS and I have no clue what is the relation.

URGENT - PTAL.
This bug is currently marked as Stable Blocker for M61 Desktop Stable respin. Pls make sure to land the fix and get it merged into the release branch ASAP. 

Note: We're planning to cut M61 Desktop Stable RC tomorrow.

Issue 764349 has been merged into this issue.

If this doesn't reproduce on m62, then I'm pretty certain the fix is:

https://chromium-review.googlesource.com/636024

I wasn't able to reproduce this issue on Windows 7,10 and Ubuntu with Chrome dev i.e., 62.0.3202.18

+amineer@ not sure how Accessibility testing is performed on Android and this could be applicable to Android or not.

Adding Chrome OS might be broken there as well (Note: Prudhvi only tested on Desktop).

If the issue only surfaces in Non-CrOS platforms, then it's absolutely unimaginable that this CrOS change could break anything: https://chromium.googlesource.com/chromium/src/+/d3d54df24c0859b0b2356055f65359d97d1b98c8

Please see c8. I was able to get a stack trace and all indications are a regression in the Aura accessibility support which gets used by ChromeVox the extension for views. I would like to merge the change referenced in c8.

This bug requires manual review: Request affecting a post-stable build
Please contact the milestone owner if you have questions.
Owners: amineer@(Android), cmasso@(iOS), ketakid@(ChromeOS), govind@(Desktop)

For more details visit https://www.chromium.org/issue-tracking/autotriage - Your friendly Sheriffbot

Approving merge for cl listed at #8 to M61 branch 3163 based on comments #8, #9, #12 and per offline chat with dtseng@.

The following revision refers to this bug:
  https://chromium.googlesource.com/chromium/src.git/+/a4e02a38f1a18d2ec0a83ffdc5eb9799347bce1e

commit a4e02a38f1a18d2ec0a83ffdc5eb9799347bce1e
Author: David Tseng <dtseng@chromium.org>
Date: Wed Sep 13 02:23:27 2017

Merge to m61: Cleanup: unify window observer handling

- both AXAuraObjWrapper and AXWindowObjWrapper serve as WindowObservers; make it so only the latter does (thereby hitting the same observer methods)
- removes fragile code that forgets to unobserve focus changes
- makes things less stateful

TBR=dtseng@chromium.org

(cherry picked from commit a8015785c4bd541d310acee1f7d457de7a4dc71a)

Bug:  764360 
Change-Id: I54f505fb8c4772fd65a1a1ae5499c51a3562e304
Reviewed-on: https://chromium-review.googlesource.com/636024
Commit-Queue: David Tseng <dtseng@chromium.org>
Reviewed-by: Dominic Mazzoni <dmazzoni@chromium.org>
Cr-Original-Commit-Position: refs/heads/master@{#497662}
Reviewed-on: https://chromium-review.googlesource.com/664479
Reviewed-by: David Tseng <dtseng@chromium.org>
Cr-Commit-Position: refs/branch-heads/3163@{#1184}
Cr-Branched-From: ff259bab28b35d242e10186cd63af7ed404fae0d-refs/heads/master@{#488528}
[modify] https://crrev.com/a4e02a38f1a18d2ec0a83ffdc5eb9799347bce1e/ui/views/accessibility/ax_aura_obj_cache.cc
[modify] https://crrev.com/a4e02a38f1a18d2ec0a83ffdc5eb9799347bce1e/ui/views/accessibility/ax_aura_obj_cache.h
[modify] https://crrev.com/a4e02a38f1a18d2ec0a83ffdc5eb9799347bce1e/ui/views/accessibility/ax_window_obj_wrapper.cc

Looks like bisect is already updated in C#3 and fix landed. Hence removing the Needs-Bisect label from this.

Looks like the fix was merged to 61 16 hours ago. Can we close this?

Verified the issue on windows 7 , ubuntu 14.04 using M61 #61.0.3163.91 and issue seems fixed.

No crash is observed on right-clicks or opening menus item after adding ChromeVox extension.

Attached screencast for reference.

Adding TE-Verified labels.

Thanks!

Deleted: 764360.mp4 1.0 MB

	764360.mp4 1.0 MB View Download

This patch is now pushing out to stable channel in version 61.0.3163.91 for Desktop (Win,Mac & Linux).

Thank you for fixing the bug. Requesting postmortem for this please see go/chrome-postmortems for the process to follow.