1928996 - zalo.me - Blank page is displayed with ETP set to Strict

Status: RESOLVED FIXED

(Web Compatibility :: Privacy: Site Reports, defect, P3)

Description

[ioanidapop]

Attachment: Strict_vs_Standard.png

Environment:
Operating system: Windows 11/10
Firefox version: Firefox 131.0.3 (release)/134

Preconditions:

• ETP set to STRICT
• Clean profile

Steps to reproduce:

1. Navigate to: https://chat.zalo.me/
2. Observe the behavior

Expected Behavior:
The page is displayed properly.

Actual Behavior:
A blank page is displayed.

Notes:

• Not reproducible with ETP STANDARD/turned OFF (both Normal and Private Browsing)
• Reproducible on the latest Nightly

---

Created from webcompat-user-report:9f6bb98b-bec6-468a-9dd4-5c9fac3a3a5b

Comment 1

[Leander Schwarz]

This is caused by ETP Strict blockign "zadn.vn" tracking content.

Expected behavior but leaving Open due to high severity.

Comment 2

[BugBot [:suhaib / :marco/ :calixte]]

Since nightly and release are affected, beta will likely be affected too.
For more information, please visit BugBot documentation.

Comment 3

[Christian Holler (:decoder)]

Unblocking zalo-chat-static.zadn.vn fixes the problem - the whole domain is listed on the "ads" sublist although it contains the main application itself.

Comment 4

[Christian Holler (:decoder)]

This bug is related to tracker blocking and can be fixed by allowing the following trackers:

zalo-chat-static.zadn.vn

(This is an automated assessment, if this is incorrect, please needinfo.)

Comment 5

[Christian Holler (:decoder)]

This bug has been fixed by a permanent intervention.

This is an automated assessment, if this bug still reproduces for you in the most recent Nightly version, please reopen.

Comment 6

[Manuel Bucher [:manuel]]

"ETP set to STRICT" doesn't block content trackers, therefore removing tp-breakage-content from blocking tp-breakage is the correct meta bug.