845876 - Faint horizontal line above the tabs when using Exposé or Mission Control in Mac OS X

Status: NEW

(Core :: Graphics, defect)

Description

[diehardboss]

User Agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10.8; rv:20.0) Gecko/20100101 Firefox/20.0
Build ID: 20130220104816

Steps to reproduce:

1. Close all windows on desktop.
2. Go to File > New Private Window.
3. Visit some site in a tab.
4. Make sure the Private Window is in focus.
5. Go into Mac OS X Exposé or Mission Control.


Actual results:

A faint horizontal line rendering above the tabs when using Exposé or Mission Control in Mac OS X.


Expected results:

No horizontal line rendering above the tabs when using Exposé or Mission Control in Mac OS X.

Comment 1

[diehardboss]

Attachment: Screen Shot of Mission Control with Horizontal Line Above Tab of Private Window

Comment 2

[Virgil Dicu [:virgil] [QA]]

I can reproduce this. F20 beta 2 and Firefox Nightly.

Doesn't happen with the old Private Browsing mode from Firefox 19, so must be a regression introduced with the feature.