Firefox runs as a PowerPC kind on an Intel Core Duo MacBook

Hi All,
For some reason, my Firefox 3.6.9 runs as a PowerPC kind (confirmed by looking at the Activity Monitor) on an Intel Core Duo Mac Book. I guess that's what causes high CPU utilization and unexpected exits. How can I ask it to run as Intel image?
TIA,
Slava Imeshev

I have Lion installed on a Mini with a C2D processor. The same Mini has Snow Leopard on another partition and there is no noticeable difference in operational speed between the two OS's. But compared to my new MBPro 17" with a 2.83GHz i7, the Mini running Lion is noticeably slower. So if you can afford anew MBPro, then I would get it because you will probably be unhappy with the performance of Lion on the older MBPro. The other benefit of getting a new MBPro with Lion is that if you have any Power PC applications currently on the old MBPro, which will not operate in Lion, then you still have the ability to use them. Many users got stung by upgrading to Lion, only to find they could no longer use the older PPC applications.

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Model Name:          MacBook
Model Identifier:          MacBook3,1
Processor Name:          Intel Core 2 Duo
Processor Speed:          2.2 GHz
Number of Processors:          1
Total Number of Cores:          2
L2 Cache:          4 MB
Memory:          2 GB
Bus Speed:          800 MHz
Boot ROM Version:          MB31.008E.B02
SMC Version (system):          1.24f3
Serial Number (system):          W8***4
Hardware UUID:          B618B269-D4FC-5A1D-BE2E-E8B2383FEEA4
Sudden Motion Sensor:
State:          Enabled
<Edited by Host>

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Hello,
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You might need to restart Firefox in order for this to take effect, so save all work first (e.g., mail you are composing, online documents you're editing, etc.).
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#* In Firefox 28.0 and previous versions, click the orange Firefox button at the top left, then select the "Options" button, or, if there is no Firefox button at the top, go to Tools > Options.
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I think I hit the wrong key ... so here it is again!
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D

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Firefox runs as a PowerPC kind on an Intel Core Duo MacBook

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