Nearly 3 months after we reviewed Netscape 9.0b2, the final version of Netscape Navigator 9 has been released today. Netscape Navigator uses the same Gecko engine as Firefox 2 (Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:184.108.40.206pre) Gecko/20071015 Firefox/220.127.116.11 Navigator/9.0) and is available for Windows, Mac OSX or Linux. Further since it is based on Firefox 2, extensions are cross-browser compatible. Any Firefox 2 extension will work with Netscape Navigator 9 as will a Netscape Navigator 9 extension work with Firefox 2.
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