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i don't have the option to run firefox 8 in 32 bit mode on my computer

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The majority of the websites I try to open give me a pop up saying I need to open them in "32 Bit Mode". When I go to the applications, then Firefox, I don't have the option of 32 bit mode there. Do I have to download it? My dad has it on his computer, he has Firefox 8, same as me.

The majority of the websites I try to open give me a pop up saying I need to open them in "32 Bit Mode". When I go to the applications, then Firefox, I don't have the option of 32 bit mode there. Do I have to download it? My dad has it on his computer, he has Firefox 8, same as me.

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See http://www.phil.im/2011/03/27/how-to-start-firefox-4-in-32-bit-mode/ - the steps are the same with Firefox 8

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Make sure that you do not run Firefox in compatibility mode.