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recently installed FF4 is running very badly, cant connect to internet, cant open gmail, please advise

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recently installed FF4, extremely unreliable, sluggish, crashes, cant access my gmail, facebook, SLOW SLOW connection if at all. I deleted FF3.6 is there something else I need to do? reinstall? please advise, thanks.

recently installed FF4, extremely unreliable, sluggish, crashes, cant access my gmail, facebook, SLOW SLOW connection if at all. I deleted FF3.6 is there something else I need to do? reinstall? please advise, thanks.

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i have windows vista and upgraded to FF4. it sux. i moved back to explorer and am waitin on anway to return to FF 3.5 or 6 or whatever. i thin updates shouldn't happen so frequently. great browser until 4.0. may try Chrome too.

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i cant get on anything said the browers is uncableable i cant even down load fire fox nothing will down load can someone help when on a web page it safari isnt cableable