Open Bug 1616046 Opened 4 years ago Updated 10 months ago

Letterboxing does not always set resolution correctly

Categories

(Core :: Window Management, defect, P3)

Product:
Core
Component:
Window Management
Version:
68 Branch
Platform:
x86_64
Linux
Type:
defect

Tracking

()

Status:
UNCONFIRMED

People

(Reporter: gkzzmuyc, Unassigned)

References

Details

(Whiteboard: [fingerprinting])

When I turn on "letterboxing" and run it on the test page, the required resolution is not always correct.

If you open the test page every time in a new tab, in about half the cases, the width is 1366 pixels (as it should be), the other half - 1440 (real width). It seemed to me that the script responsible for the operation of the "letterboxing" does not always have time to change the value.

Testpage:
<html><body onload="alert(window.innerWidth)"></body></html>

Settings
privacy.resistfingerprinting = true
privacy.resistfingerprinting.letterboxing = true
privacy.resistfingerprinting.letterboxing.dimensions = "1366x768"

Component: Private Browsing → Window Management
Product: Firefox → Core

Tom, do you have time to confirm this?

Component: Window Management → Security
Product: Core → Firefox

What test page are you referring to?

There is Bug 1556016

Blocks: letterboxing

The priority flag is not set for this bug.
:johannh, could you have a look please?

For more information, please visit auto_nag documentation.

Flags: needinfo?(jhofmann)
Flags: needinfo?(jhofmann)
Priority: -- → P3
Component: Security → Window Management
Product: Firefox → Core
Whiteboard: [fingerprinting]
Severity: normal → S3
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