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Issue 608124 link

Starred by 3 users
Status: Duplicate
Owner: ----
Closed: Sep 2017
Cc:
rsesek@chromium.org
xhw...@chromium.org
battre@chromium.org
msramek@chromium.org
Components:
EstimatedDays: ----
NextAction: ----
OS: Mac
Pri: 2
Type: Bug



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Reliable Incognito Mode Detection

Reported by zachbor...@gmail.com, Apr 30 2016 
UserAgent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_11_4) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/50.0.2661.86 Safari/537.36

Steps to reproduce the problem:
1. Login to Netflix
2. Attempt to watch something
3. You are greeted by "Your browser appears to be in Incognito Mode."

What is the expected behavior?
A website should not be able to detect incognito mode.

"Incognito shouldn't be detectible ideally."
https://bugs.chromium.org/p/chromium/issues/detail?id=588766#c2

What went wrong?
Netflix was able to detect incognito mode.

Did this work before? N/A 

Chrome version: 50.0.2661.86  Channel: n/a
OS Version: OS X 10.11.4
Flash Version: Shockwave Flash 21.0 r0

Text of Netflix's error page:

Whoops, something went wrong...

Incognito Mode Error

Your browser appears to be in Incognito Mode.

Please turn off Incognito Mode and try again.
Error Code: M7363-1260-00000024
netflix-incognito-mode-detected.png
111 KB View Download

Comment 1 by rsesek@chromium.org, May 2 2016

Components: UI>Browser>Incognito Privacy
Owner: battre@chromium.org
Status: Assigned (was: Unconfirmed)
battre: Can you help triage? Is this a known issue?

Comment 2 by rsesek@chromium.org, May 2 2016

Cc: rsesek@chromium.org
Labels: -Type-Bug-Security -Restrict-View-SecurityTeam Restrict-View-ChromePrivacy Type-Bug

Comment 3 by zachbor...@gmail.com, Sep 9 2016 

Hi. Was wondering if anyone has had a chance to take a look at this. Thanks

Comment 4 by battre@chromium.org, Sep 9 2016

Cc: battre@chromium.org
Labels: -Restrict-View-ChromePrivacy
Owner: ----
Status: Available (was: Assigned)
It's in the "it would be really nice" category but nobody ever got to fixing this.

IIRC, Netflix' incentive for blocking in incognito mode is a DRM issue. We don't give them access to a stable identifier so every incognito session would look like a new computer and you would burn through your licences.
Project Member

Comment 5 by sheriffbot@chromium.org, Sep 11 2017

Labels: Hotlist-Recharge-Cold
Status: Untriaged (was: Available)
This issue has been Available for over a year. If it's no longer important or seems unlikely to be fixed, please consider closing it out. If it is important, please re-triage the issue.

Sorry for the inconvenience if the bug really should have been left as Available. If you change it back, also remove the "Hotlist-Recharge-Cold" label.

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

Comment 6 by shrike@chromium.org, Sep 15 2017

Owner: battre@chromium.org
[mac bug triage] -> battre for triage

Comment 7 by battre@chromium.org, Sep 15 2017

Owner: msramek@chromium.org

Comment 8 by msramek@chromium.org, Sep 20 2017

Cc: msramek@chromium.org xhw...@chromium.org
Mergedinto: 93417
Owner: ----
Status: Duplicate (was: Untriaged)
+xhwang@ who's looking into the issue described in comment #4.

But otherwise, IIRC Netflix uses the Filesystem API, this can be deduplicated into issue 93417.

Comment 9 by xhw...@chromium.org, Sep 20 2017 

See issue 410530 for the detailed context.
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