1540308 - privacy.resistFingerprinting set to true causes webpage to be white. Background image with z-index 5000 is not transparent.

Status: RESOLVED WORKSFORME

(Core :: Graphics, defect, P3)

Description

[CapSel]

User Agent: Mozilla/5.0 (X11; Linux x86_64; rv:66.0) Gecko/20100101 Firefox/66.0

Steps to reproduce:

on websites:

• polishburger.pl
• vivalapizza.pl

every element is rendered white while setting "privacy.resistFingerprinting" is set to true.
Switching it to false makes webpage render correctly.

Same thing happens on another two computers. So in total:

• archlinux + firefox 66.0.2
• ubuntu + firefox 66.0.2

Actual results:

Pasted div should not be visible.

<div class="watermark__overlay" style="position: fixed; inset: 0px; background: rgba(0, 0, 0, 0) url("data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAABAAAAAQCAYAAAAf8/9hAAAAeElEQVQ4jY2TQQ4AIQgD6/8f7V7WROtUOBAj1AIFJWlIGnPO49z9HjswC0AgJ0P/fvGgk2MVnrGV9fRx3+6P1SSQ6/Igy8oTAWpQZU4t/sajq6ZzaUCAqq3YQmcSF4FnbK3xa5XpEVabHqRJ4F+oNq4lYhQplL7sA8qvo2y0FPjzAAAAAElFTkSuQmCC") repeat scroll 0% 0%; z-index: 5000; pointer-events: none;"></div>

Expected results:

Page should not be white.

Comment 1

[Stefan [:StefanG_QA]]

Mozilla/5.0 (X11; Linux x86_64; rv:68.0) Gecko/20100101 Firefox/68.0 (20190402083512)

I've tested this report on Ubuntu 18.10 using the latest Nightly and Firefox release build. I was able to reproduce the mentioned behavior. Both pages render white when "privacy.resistFingerprinting" is set to true. If the pref is set to false the pages are rendered correctly.

Comment 2

[Viktor Jägersküpper]

This should block bug 1507517, please edit the corresponding entry in the "Tracking" section accordingly so that the anti-fingerprinting people become aware of this bug.

Comment 3

[Thorin [:thorin]]

Tested on Nightly 73, Windows and both sites appear to work just fine. Note: I disabled ETP so nothing was blocked.

Comment 4

[Tom Ritter [:tjr]]

I imagine that sometime in the four years since this was opened, the websites fixed their behavior, as it doesn't repro for me either.