Adobe Flash Player 11 turn slowly in FF 14

Currently using 14 FF (channel) with Flash Player 11 (updated today, 07-21-12). Flash objects, such as Facebook games, run slow/choppy to the point where it looks like a collection of tiles of update in a few seconds.
I've deleted temporary files, compact databases, uninstalled and reinstalled FF, updated display drivers, ran flash in full screen mode and tested objects the same objects flash in other browsers.
Operating in mode full screen relieves the slow, but there is a delay when loading content that is not normally noticed when viewing on a normal page; However, the action plays as it should. View other browsers, such as IE flash content, allows the content to play with fluidity, as it should. Toggle the flash hardware acceleration (parameters) does not seem to affect the performance and the global settings allow Web sites to store sufficient data. Also, restarting does not solve the problem.

The PC in question is under Win 7 32 bit. 2 GB OF RAM; Dual Core 1.8 GHz processor; Graphics ATI Radeon HD 2400 @ resolution 1280 x 1024.

Manager tasks indicates that the Flash Player uses up to 60% of the time CPU, Firefox uses less than 15% to the maximum, and the plugin container runs generally less than 10% during the display of the flash object on a page normally. Full-screen view of the flash object can have Flash Player take up to 70% of the time CPU, but playback is smooth.

What was the latest version of Flash, which did not have this problem - 11.3.300.262 or 11.2 or 10.3?

Flash 11.3 implements a new protected mode, which can spawn process outside the process of plugin - container.exe. This doesn't seem to be a problem for most users, but could be a problem on some systems. I don't see how it would behave differently on the page vs full screen. However, if you want to test if the protected mode is relevant, you may want to temporarily disable this new feature. In the following article, scroll down to the 'Last resort' section: Adobe Forums: how to fix protected Flash Player for Firefox mode?

Tags: Firefox

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    ______________________________________________________________

    Copyright © 2014, 2015 by Linc Davis. As the sole author of this work (including the "Test of diagnosis" referenced), I reserve all rights except as provided in the terms of use agreement for the site of Apple support communities ("CSA"). ASC readers can copy for their personal use. The whole nor any part can be redistributed.

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