1786268 - Page is broken on giacngo.vn with ETP set to Strict

Status: NEW

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

Description

[Calin Tanase]

Attachment: giacngo.vn.png

Environment:
Operating system: Windows 10
Firefox version: Nightly 105.0a1 (2022-08-21)

Preconditions:
• ETP set to STRICT
• Clean profile

Steps to reproduce:

1. Go to https://giacngo.vn
2. Observe the page.

Expected Behaviour:
The page loads correctly.

Actual Behaviour:
The page is broken due to CSS issues.

Notes:

1. Screenshot provided
2. Reproducible with both Standard and Strict ETP in Private.
3. Not reproducible with Standard ETP in Normal window.

Comment 1

[Thomas Wisniewski [:twisniewski]]

I see this error in the console:

Uncaught ReferenceError: PRINT_OPTS is not defined
    <anonymous> https://giacngo.vn/:2536
giacngo.vn:2536:1

If I disable ETP, PRINT_OPTS is in this script: https://static-cms-giacngo.zadn.vn/web/js/amlich-hnd.js?v=1

And since this is how they load it, if that script is blocked or fails to load due to a networking hiccup, it will break their entire site:

<script src="https://static-cms-giacngo.zadn.vn/web/js/amlich-hnd.js?v=1"></script>
<script type="text/javascript">
PRINT_OPTS.container = 'lunarcalendar';
printSelectedMonth(0, 0);
</script>

Predictably, that script is being blocked by ETP as a tracker.

It doesn't look like a good idea to shim this script as it's specific to this site. So I think proxying the request or letting the user opt into the tracking might be the only way forward for now.