1841500 - Fingerprinting.resist enable screenshots only left top corner instead of selected area/ all visible

Status: NEW

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

Description

[Tomer Yavor]

User Agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10.15; rv:109.0) Gecko/20100101 Firefox/116.0

Steps to reproduce:

I am using the latest nightly firefox.

1. Enable privacy.resistFingerprinting to true
2. Visit some website. E.g. https://www.mozilla.org/en-US/
3. Try to make a screenshot of a selected area or click on "screenshot all visible"

Actual results:

Screenshots only the top left of website

Expected results:

selected area should be screenshoted

Comment 1

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

The Bugbug bot thinks this bug should belong to the 'Core::Privacy: Anti-Tracking' component, and is moving the bug to that component. Please correct in case you think the bot is wrong.

Comment 2

[Kestrel]

I can't reproduce this on latest Nightly 118.0a1 (2023-08-01) with privacy.resistFingerprinting = true.

Comment 3

[Kestrel]

Attachment: Visible page screenshots correctly with RFP

Comment 4

[Thorin [:thorin]]

I tested on Nightly 118 as well. I couldn't repro. I turned on letterboxing and caused matte on all sides, and couldn't repro

Tomar, what is your system's devicePixelRatio - if you are not sure, you can go to about:support and search for device pixel ratio ? Sounds like a duplicate of Bug 1780910 ?