I have downloaded the stub file using both IE & Chrome trying to get firefox to install on my Windows Vista (Mac) and the stub starts but does not complete. I deleted the stub 27.0.1 after downloading the latest one otherwise I would install firefox using the old stub. Please advise, I upgraded my Mac from windows xp to windows vista, firefox was installed and one of the kids inadvertently removed it when trying to upgrade firefox to the latest version. Your assistance is greatly appreciated. Regards, Verta