1695154 - Unable to unsubscribe from mcdonalds.com with ETP - Strict

Status: NEW

(Core :: Privacy: Anti-Tracking, defect, P3)

Description

[Oana Arbuzov [:oanaarbuzov]]

Attachment: StandardVsStrict.png

Environment:
Browser / Version: Firefox Focus 8.12.0 (🦎 85.0-20210118153634), Firefox Nightly 210226 (🦎 88.0a1-20210225215504)
Operating System: Samsung Galaxy S8 (Android 9) - 1440 x 2960 pixels, 18.5:9 ratio (~570 ppi density)

Steps to reproduce:

1. Navigate to https://www.mcdonalds.com/us/en-us/subscription.html?op=unsubscribe
2. Type in the email address.
3. Tap "Confirm to Unsubscribe" button.
4. Observe behavior.

Expected Behavior:
Unsubscribed is performed.

Actual Behavior:
A loading spinner is displayed indefinitely and unsubscribed is not performed.

Note
1. The issue is not reproducible with ETP Standard.
2. Screenshot attached.

Comment 1

[Thomas Wisniewski [:twisniewski]]

This is because we're blocking the request when the user clicks https://p1mcds-rt-gw.epsilon.com/global/prefctroptoutsubscription.

It's POSTed-to using an XMLHttpRequest from a click event handler, so we're more or less stuck here. We'd have to allow those requests on a site-by-site basis, since there is no other obvious request being made for scripts/etc from that server before the user clicks on the button.

Comment 2

[Liam England]

:twisniewski, I don't think you meant to block that bug.

Comment 3

[Thomas Wisniewski [:twisniewski]]

You're right, that was a copy-paste error.

Comment 4

[Ruth Tyle]

(In reply to Oana Arbuzov [:oanaarbuzov] from comment #0)

Created attachment 9205642 [details]
StandardVsStrict.png

Environment:
Browser / Version: Firefox Focus 8.12.0 (🦎 85.0-20210118153634), Firefox Nightly 210226 (🦎 88.0a1-20210225215504)
Operating System: Samsung Galaxy S8 (Android 9) - 1440 x 2960 pixels, 18.5:9 ratio (~570 ppi density)

Steps to reproduce:

1. Navigate to Mcdonalds menu with prices https://www.mcdonalds.com/us/en-us/subscription.html?op=unsubscribe
2. Type in the email address.
3. Tap "Confirm to Unsubscribe" button.
4. Observe behavior.

Expected Behavior:
Unsubscribed is performed.

Actual Behavior:
A loading spinner is displayed indefinitely and unsubscribed is not performed.

Note
1. The issue is not reproducible with ETP Standard.
2. Screenshot attached.

I also don't think you intended to block this bug.