FAQ по новой версии, закачка, установка, всё тут http://www.mozilla-europe.org/ru/products/firefox/2.0.0.13/releasenotes/
MFSA 2008-19 XUL popup spoofing variant (cross-tab popups) MFSA 2008-18 Java socket connection to any local port via LiveConnect MFSA 2008-17 Privacy issue with SSL Client Authentication MFSA 2008-16 HTTP Referrer spoofing with malformed URLs MFSA 2008-15 Crashes with evidence of memory corruption (rv:1.8.1.13) MFSA 2008-14 JavaScript privilege escalation and arbitrary code execution