When a customized Adobe Flash content's context menu is accessed using Mozilla Firefox, a CPU core's usage is displayed at 100% (measured using Windows Task Manager on Windows XP Professional with Service Pack 2). EDIT: Also, the out-of-process plugin container must be disabled. See the third post for the settings to disable the plug-in container.
The problem does not manifest for all customized Flash context menus; however, the problem does consistently manifest for flash content where the problem manifests. I am speculating that the problem manifests when the flash content's context menu is customized a certain way.
Two examples of flash content for which the problem manifests:
- "The Right-Click me to check the Context Menu." labeled flash object on the http://www.republicofcode.com/tutorials ... ntextmenu/ page.
- Any Youtube video video on a Youtube page. Example: http://www.youtube.com/watch?v=R0zzz3f9VpI
I have tested the behavior to occur on Mozilla Firefox 3.6.28, Mozilla Firefox 6.0.2, and Mozilla Firefox ESR 10.0.10esr. The problem manifests regardless of whether extensions are installed.
I have tested the behavior to occur with the latest 10.3 series of the flash player at the time of this post (10,3,183,43), and also older versions of the 10 series (Adobe Flash Player 10,3,183,18 and Adobe Flash Player 10,3,183,29).
The problem does not manifest at all on Opera 10.63 nor on Internet Explorer 6 with SP2 (Internet Explorer series should use a different plug-in (but shared control panel applet on Windows) than used by Mozilla and Opera).
The problem has been tested to manifest on Windows XP Professional with Service Pack 2.
Though the problem manifests on all the tested versions, the problem is least bothersome with 10,3,183,18 (less frame skipping on video playback). Wherefore, at this time Adobe Flash Player 10,3,183,18 is preferred to newer versions.
Notwithstanding the consideration of the problem described herein, I would prefer to use a latest version of Adobe Flash Player, largely compatible version of Adobe Flash Player (so not the 11 series). At the time of this post the latest version of Adobe Flash Player is 10,3,183,43 (November 06, 2012 release date).
I am uncertain whether the problem is with Firefox or Adobe Flash Player. Is the problem with Firefox? I would appreciate more information regarding this issue or assistance to workaround this problem
EDIT: For my tests, plugin-container.exe was disabled. After enabling plugin-container.exe, the problem did not manifest.
Notes: Full installer versions of Adobe Flash Player may be acquired: http://helpx.adobe.com/flash-player/kb/ ... sions.html