1630883 - privacy.resist.fingerprinting does not account for bookmarks toolbar presence.

Status: RESOLVED DUPLICATE of bug 1418537

(Core :: Security, defect)

Description

[slew]

User Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:68.0) Gecko/20100101 Firefox/68.0

Steps to reproduce:

• Enable privacy.resist.fingerprinting.
• Check "Screen Size and Color Depth" on https://panopticlick.eff.org/
• Turn on bookmarks toolbar.
• Reopen window or restart Firefox to allow screen size change.
• Check "Screen Size and Color Depth" on https://panopticlick.eff.org/

Actual results:

• First result should be 1000x1000x24.
• Second result is not 1000x1000x24.

Expected results:

• First result should be 1000x1000x24.
• Second result should be 1000x1000x24.

Comment 1

[BugBot [:suhaib / :marco]]

Bugbug thinks this bug should belong to this component, but please revert this change in case of error.

Comment 2

[Mark Banner (:standard8)]

I can reproduce on latest nightly. Not sure the best component for this.

Comment 3

[Johann Hofmann [:johannh]]

Tom, can you take a look whenever you have time again? :)

Comment 4

[Firefox Bug Husbandry Bot]

Resetting severity to default of --.

Comment 5

[Thorin [:thorin]]

Duplicate of Bug 1418537

That's assuming comment 0's results were the height being out. Note the height is affected by the toolbar if it has at least one icon displayed, and it will vary between platforms/distros, and it will vary by density, and it can vary depending on your theme (from AMO). Typically it is 2 to 5 pixels short. The regression goes back to FF57 and the introduction of Photon

Comment 6

[Firefox Bug Husbandry Bot]

Because this bug's Severity has not been changed from the default since it was filed, and it's Priority is -- (Backlog,) indicating it has has not been previously triaged, the bug's Severity is being updated to -- (default, untriaged.)