1729301 - Video and map does not load on mapillary.com with ETP - Strict enabled

Status: NEW

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

Description

[Oana Arbuzov [:oanaarbuzov]]

Attachment: StrictVsStandard.png

Environment:
Browser / Version: Firefox Focus 91.4.0 (🦎 91.0.1-20210830133508) , Firefox Nightly 93.0a1 (🦎 93.0a1-20210905094656)
Operating System: Google Pixel 5 (Android 11) - 1080 x 2340 pixels, 19.5:9 ratio (~432 ppi density), Samsung Galaxy S8 (Android 9) - 1440 x 2960 pixels, 18.5:9 ratio (~570 ppi density)

Prerequisites:
ETP - Strict enabled.

Steps to reproduce:

1. Navigate to https://www.mapillary.com/
2. Accept cookies.
3. Tap to watch the video.
4. Observe behavior.

Expected Behavior:
Video plays.

Actual Behavior:
Video does not play.

Notes:

1. Screenshot attached.
2. Also reproducible for the map after tapping "Explore map data" button.
3. The issue is not reproducible with ETP - Standard

Comment 1

[Tim Huang[:timhuang]]

Changing severity to S3 because this is a TP issue on Strict mode.

Comment 2

[Thomas Wisniewski [:twisniewski]]

The page is relying on Facebook-hosted resources which are being blocked at https://scontent-yyz1-1.xx.fbcdn.net/. The best I believe we can do here is to detect the page's reliance on those resources, and let the user opt into allowing just them, instead of dropping all stricter tracking protections.