Firefox has released new version 3.0.4. Well functionality is nearly the same but they have patched the security fixes.

Below security fixes are integrated in newer version

MFSA 2008-58 Parsing error in E4X default namespace
MFSA 2008-57 -moz-binding property bypasses security checks on codebase principals
MFSA 2008-56 nsXMLHttpRequest::NotifyEventListeners() same-origin violation
MFSA 2008-55 Crash and remote code execution in nsFrameManager
MFSA 2008-54 Buffer overflow in http-index-format parser
MFSA 2008-53 XSS and JavaScript privilege escalation via session restore
MFSA 2008-52 Crashes with evidence of memory corruption (rv:1.9.0.4/1.8.1.18)
MFSA 2008-51 file: URIs inherit chrome privileges when opened from chrome
MFSA 2008-47 Information stealing via local shortcut files

Also they have also now brought out Firefox in some new languages including Icelandic, Thai, Esperanto, Occitan, and Welsh! I am not sure whether this is really required or just wanted to add something different in newer release

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