1803047 - Preview images are not displayed on naver.com with Standard ETP

Status: NEW

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

Description

[Calin Tanase]

Environment:
Operating system: OnePlus 6 A6000 (Android 11)
Firefox version: Nightly 109.0a1-20221128094337

Preconditions:
• ETP set to Standard
• Clean profile

Steps to reproduce:

1. Go to https://m.cafe.naver.com/ca-fe/xst
2. Scroll down the page until you find a post with image preview.
3. Observe the behaviour.

Expected Behaviour:
The image preview is displayed.

Actual Behaviour:
The image preview is not displayed, there's an exclamation mark in a circle ( ! ) as a placeholder.

Notes:

1. Reproducible on both Firefox Release and Nightly
2. Same behaviour in Private
3. Reproducible only with clean profile

Comment 1

[Calin Tanase]

Attachment: cafe naver.png

Comment 2

[Tim Huang[:timhuang]]

I can reproduce the issue even with ETP toggle disabled.

Comment 3

[Tim Huang[:timhuang]]

Sometimes, the issue just disappears.

Tom, could this be a webcompat issue?

Comment 4

[Thomas Wisniewski [:twisniewski]]

Yes, it may be. We actually have a site intervention for serieson.naver.com, where they lock out Firefox unless a user-agent override is used: https://bugzilla.mozilla.org/show_bug.cgi?id=1753461

So they probably have other cases where there are compat issues on their subdomains. I'll take a look ASAP.

Comment 5

[Tim Huang[:timhuang]]

Thanks, I will just assign this bug to you.