583761 - When high CPU usage, window control buttons unresponsive/ineffective

Status: UNCONFIRMED

(Firefox :: Shell Integration, defect)

Description

[Cam]

User-Agent:       Mozilla/5.0 (Macintosh; U; Intel Mac OS X 10.6; en-US; rv:1.9.2.8) Gecko/20100722 Firefox/3.6.8
Build Identifier: Mozilla/5.0 (Macintosh; U; Intel Mac OS X 10.6; en-US; rv:1.9.2.8) Gecko/20100722 Firefox/3.6.8

This one is hard to reproduce consistently, but does happen to me almost monthly.

When I have lots of my CPU used at once and I use any of the window controls at the top left of the window to close, minimize, or maximize the window occasionally the button will darken (as when I click it normally) however nothing will happen (you can wait indefinitely even once the CPU is freed) and the button stays darkened.

Reproducible: Sometimes

Steps to Reproduce:
1. Really tax your CPU (to increase chances of success)
2. click on one of the window controls (works most often with close)
3. go back to 1. until it works.
Actual Results:  
Window does not respond to click, button darkens but does not return to normal.

Expected Results:  
Window should respond to button click as usual, and button should return to normal bright appearance.

This seems to be a result of Firefox "faking" it's interface, perhaps it would be easier to make a native Cocoa interface?