Olá
Download em http://www.mozilla.com/firefox/
Firefox 1.5.0.4 is a security update that is part of our ongoing program to provide a safe Internet experience for our customers. We recommend that all users upgrade to this latest version.
* Improvements to product stability
* Several security fixes
Release Date: June 1, 2006
http://www.mozilla.org/projects/security/known-vulnerabilities.html#firefox1.5.0.4
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Luca