1714110 - Page keeps reloading when tapping on a link with ETP set to STRICT at mediamarkt.nl

Status: NEW

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

Description

[Raul Bucata]

Attachment: Screenshot 2021-06-02 173943.png

Environment:
Operating system:iOS 14.4.2
Firefox version: : Firefox Daylight 34.0 (4920)

Preconditions:
ETP set to STRICT
Clean profile

Steps to reproduce:

1. Navigate to :https://www.mediamarkt.nl/nl/category/_gaming-film-muziek-488118.html
2. Tap on "Playstation"
3. Observe the result

Expected Behavior:
A new page is opened

Actual Behavior:
The page is stuck in a loading loop

Notes:

• Not reproducible with ETP set to STANDARD.
• Works as expected using Safari

Comment 1

[Thomas Wisniewski [:twisniewski]]

It appears that the problem here is that they use Google Tag Manager dataLayer events, but our shim for GTM doesn't kick in because it specifically is not blocked on their page. However, Google Analytics is also on their page, and is being blocked and shimmed, so we have a way to deal with this.

In fact, looking over the code, we don't really think we need a dedicated shim for Tag Manager, and we can just fold the two together, and have the Analytics one handle both cases including handling the dataLayer events.

I'll modify bug 1713687 to handle this task, since I already have updates pending for the Analytics shim.

Comment 2

[Thomas Wisniewski [:twisniewski]]

I just confirmed that the fix in bug 1713687 did the trick here for desktop Firefox, so once SmartBlock makes it to iOS it ought to help there as well.

Comment 3

[Raul Bucata]

The issue is still reproducible on iOS devices.

Tested with:
Browser/Version: Safari 14.6/ Firefox Daylight 35.0 (5448)
Operating System: iOS 14.6

Comment 4

[Hani Yacoub, Desktop QA]

The issue isn't reproducible on desktop on Firefox 91.0a1 (2021-06-02) or on the latest Firefox Nightly 93.0a1 (2021-08-09) on Windows 10 x64, macOS 11.4 or on Ubuntu 20.04 x64 following the steps from the description.

Comment 5

[Simon Basca [:SimonB]]

This issue is still reproducible on iOS.

Tested with iPhone Xr (iOS 14.5.1) with latest Firefox main f6d9f5a8c4c564 and v36.0 (5732).