426010 - Browser unresponsive after opening context menu in full screen youtube flash video

Status: RESOLVED DUPLICATE of bug 294688

(Firefox :: General, defect)

Description

[Dan Weiss]

User-Agent:       Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.9pre) Gecko/2008032904 Minefield/3.0pre
Build Identifier: Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.9pre) Gecko/2008032904 Minefield/3.0pre

If I right click on a fullscreen flash video window to create a context menu, the flash video plays very slowly, eats 100% CPU usage, and the context menu is unresponsive.  If I try to click away from the context menu, it does not close.  Only Alt+Tabbing away from Firefox to another program makes it respond again.

Additionlly, this happens in any situation where the following are all true:
* The browser has a popup window without all the toolbars available
* The flash clip is opened by itself with no container document  (not entirely sure about this)
* The flash clip uses 100% CPU usage

I'm pretty sure this is Bug 420148 all over again, and that needs to be reopened and fixed once more.

Reproducible: Always

Steps to Reproduce:
1. Watch any video on youtube
2. Hit "Full Screen"
3. Right click, possibly before the "Press ESC to exit fullscreen" notice disappears.
Actual Results:  
Firefox opens a context menu slowly, plays the video very slowly, and does not respond to mouse or keyboard events.  Clicking off the context menu does not dismiss the menu, clicking on items in the context menu does not activate the menu items.

Expected Results:  
Firefox should respond to events.

I'm almost positive that this is Bug 420148 all over again.