1633813 - Prompt to reload page after allowing content to extract canvas data

Status: NEW

(Core :: Graphics: Canvas2D, enhancement, P5)

Description

[sanketh]

Attachment: picture of prompt

User Agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10.15; rv:75.0) Gecko/20100101 Firefox/75.0

Steps to reproduce:

• Set privacy.resistFingerprinting = true
• Set privacy.resistFingerprinting.autoDeclineNoUserInputCanvasPrompts = false
• Go to https://web.whatsapp.com/
• Upload a file
• Select "Allow Data Access" in the prompt

Actual results:

The extracted canvas data is the placeholder all-white image, not the extracted data; in other words, canvas data was not extracted.

Expected results:

Canvas data should be extracted.

Comment 1

[sanketh]

A Possible Solution: When the user selects "Allow Data Access" in the prompt, show another prompt with

Q: "reload required for changes to take effect"
grey) "ignore"
active) "reload now"