FirefoxMozilla Foundation has announced that the Mozilla Firefox 1.0 web browser took the top spot on PC World's ranking of 100 best products for 2005. PC World named Firefox its "Best Product of 2005". Mozilla's email client, Mozilla Thunderbird 1.0, also ranked high on PC World's list of top 100 product citing Thunderbird's email sorting functions, top notch spam filters and speedy performance.