I have a Mac that you are threatening not to serve any more. I read about your Extended download. If I do not download this Firefox Extended upgrade, does this mean that my Mac will not be able to browse and read web pages, etc., or will I not be able to open any URLs? Also, I am having problems with some downloads in Acrobat not displaying the proper font type and size and kerning, but it downloads and prints those documents in the right dimensions. Is this a Firefox problem or an Acrobat problem or a computer problem? I should mention that I am just about out of memory on this old computer and do not wish to add more downloads at this time, until I can get some memory cleared out, which might take me awhile.