Firefox Flash hardware acceleration broken in Windows 8 for AMD 4870

I've been having performance issues with Flash in Firefox on Windows 8 ever since I installed it, so I decided to try and get to the bottom of the issue, since Chrome's Pepper Flash plugin works flawlessly on the same machine. I decided to install Windows 7 as a dual-boot environment to do some testing, and installed the same version of Firefox (21), with all the same extensions, the same version of Flash (11.7) and the same display driver (Catalyst 13.1 Legacy). I was surprised to find that the performance issues I'd been having in Windows 8 were completely gone.
On closer inspection, that seems to be because the 'Use hardware acceleraton' checkbox is doing nothing in Windows 8. Whether it's checked or not, playing a beefy Flash video (one of Giant Bomb's HD progressive streams) uses 35-40% CPU and is pretty choppy. The exact same video, delivered via the exact same software but under Windows 7 is entirely smooth and CPU usage is around 5-10% with the checkbox ticked, and comparable to Windows 8 with hardware acceleration turned off.
In another test, I compared videos on Youtube with the information box turned on. In Windows 7 it's showing as software video rendering and accelerated video decoding regularly, changing to accelerated for both in full screen. With the exact same setup on Windows 8, it shows software rendering and decoding no matter what, with the associated higher CPU use and poorer video performance. Incidentally, reverting to Flash 10.3 on Windows 8 completely fixes the problem. Hardware acceleration works as it should in all scenarios. It seems to just be the 11 series that's affected.
Is this a known issue at all, and is there any sort of fix planned? Or is there a way to fix it now? Any help would be appreciated.

it seems that the problem might not be from adobe side after all!
Windows 8 user,
open firefox and type about:config in the address bar and hit enter. Type “webgl” into the Filter box and then double click on the webgl.force-enabled option to change its value from false to true.
Problem solve...Radeon HD-7310 dont know for Nvidia but i assume it will work to.

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I disabled the Adobe Flash hardware acceleration as recommended but FF still crashes often

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That resolved the issue. Thank you so much.

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'''[https://support.mozilla.org/en-US/forums/support-forum-contributors/710576 Possible Mal-Ware Scan For Macs]''' {web link}
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* [http://www.malwarebytes.org/products/malwarebytes_free/ MalwareBytes' Anti-Malware]
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Did this fix your problems? Please report back to us!

Oracle10g client for windows 64 for amd

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Hello ,
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Give both user accounts full local admin privileges.
Can anyone suggest something to try next?
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ProtectedMode=0
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AdapterDeviceID: 0x2a02
AdapterVendorID: 0x8086
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BuildID: 20120713134347
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EMCheckCompatibility: true
Email: [email protected]
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FramePoisonSize: 4096
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// @namespace      http://userscripts.org/topics/3090#posts-11620
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// @grant          none
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Hello,
Nowadays number of devices supporting flash is quite huge, however some of those devices do not support right clicking.
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hi,
i've tried all possible wmode options, however they don't really affect the video playback problem I am facing. the only way to fix it is to disable hardware acceleration in flash settings.
to be frank, I find current situation quite irritating - every service providing video experience to the users via flash is having special page containing advices for HW acceleration disabling:
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youtube: https://support.google.com/youtube/answer/1230977?hl=en
hulu: http://www.hulu.com/help/articles/166587
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How do I disable the hardware acceleration in Flash player on a Windows XP machine remotely?

How do I disable the hardware acceleration in Flash player on a Windows XP machine remotely?
I have a few hundred computers running Adobe Flash Player.
The operation system is Windows XP.
They are Compaq 6005 desktop PC’s, with an inbuilt ATI radeon HD 4200 video card.
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Hi.
I have had over 200 views, and no suggestions as to how this could be fixed.
I have also posted in the general flash forum, that thread has fewer views.
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I noticed when my Firefox is minimized that I can not reopen from the Dock on my MAC. So I stop Firefox and reopen, when doing so I get a mixed number of blank windows. After closing these then Firefox behaves as desired until after a bit it all happens again. I read the Windows fix and hoped hardware acceleration would fix it but it does not.

Hello,
Try disabling graphics hardware acceleration. Since this feature was added to Firefox, it has gradually improved, but there still are a few glitches.
'''[https://support.mozilla.org/en-US/kb/troubleshoot-firefox-issues-using-safe-mode Start Firefox in Safe Mode]''' {web link}
While you are in safe mode;
Type '''about:preferences'''<Enter> in the address bar
Select '''Advanced > General.'''
Look for and turn off '''Use Hardware Acceleration'''.
Poke around safe web sites. Are there any problems?
Then restart.

Flash Player - Disable Hardware Acceleration - Apple TV-Mac OS 10.4.7/Firefox

Hello all,
I have been going down a fun path getting my 1st Generation Apple TV (160 GB HD) to run Hulu natively (without PlayOn restreaming). After fun times getting Firefox and Flash Player working, I blasted through setting up Hulu Widget to keep the video size small (Apple TV in 480p defaults to an 800x600 res).   Things look pretty good. I maxed out buffering/cache for all Hulu related sites within Global settings, this produced nice improvements. I found a GreaseMonkey script that forces the Flash Player to always render Low Quality video. This helps immensely at stopping stuttering with little trade off in quality. My last piece to try to tweak video playback (aside from monkeying around with the OS X kernel) is the disable Hardware Acceleration.
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http://niquimerret.com/?p=159
http://www.adobe.com/devnet/flashplayer/articles/fplayer10_1_hardware_acceleration.html
I am thinking perhaps I can take the Low Quality JS (http://userscripts.org/scripts/review/38994) and replace "quality" with "wmode". Am I on track?    It seems "opaque" might be the right one. http://kb2.adobe.com/cps/127/tn_12701.html
There is a case related to my question: https://bugs.adobe.com/jira/browse/FP-5748
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Hi, LOL at my screen moniker. That's interesting that the FF beta has an Option for that. The only problem, is that I have heard that each browser must UNcheck the H.A. I'm sure you'll find out.
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I have a 55" HD Sony/Blu-ray Surround Sound Speakers, etc. I hooked up the VGA cable for Internet, and WOW on the Screen/Monitor!! Now I'm thinking about the iPhone 4 with VZ too, on their pre-order list for 2/3/11!
Hard to keep up with the Technology, moving faster today for some reason.
We are under the Snow & Ice warning, getting it now. Hope I don't lose power! If so, I'll be offline for sure.
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Thanks,
eidnolb

Firefox Flash hardware acceleration broken in Windows 8 for AMD 4870

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