FireFox with adobe flash using a retina macbook pro under win 8.1 64 bit is lagging . when you move the mouse above any flash game / video

Hi
I asked this question again and i reported this bug , i am a computer engineer and i tested it with few macbook pro retina laptops , when u use win 8.1 64 bit or 32 bit and install adobe flash under firefox try to play any game in facebook , view video on youtube or use any FLASH video and move the mouse above the screen of the flash game / video / etc , the screen will lag alot .
under chrome this problem doesnt exist but the screen is blurry in chrome when using retina screen thats why firefox is better , but the problem is annoying .
i tried to disable hardware acceleration as you suggested still the same problem

Hi thesoulkeeper,
Do you have the bug number? We can try needsinfo to ask for some help.

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FireFox with adobe flash using a retina macbook pro under win 8.1 64 bit is lagging . when you move the mouse above any flash game / video

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