The Mozilla team just released two new security updates for its popular web browser, Firefox 3.5.3 and Firefox 3.014. The updates are now available for Windows, Mac, and Linux users and fix several security issues as well as stability issues.

Specifically, the new update for Firefox 3.5x fixes crashes with evidence pointing to memory corruption. The team presumes that with enough effort, at least some of these bugs could be exploited to run arbitrary code.

Additionally, the default Windows font used to render the location-bar and other text fields was improperly displaying certain Unicode characters with tall line-height. An attacker could use this vulnerability to prevent a user from seeing the URL of a malicious site.

There are other security concerns addressed which can be found in the Security Advisories release notes.

Firefox 3.0.14 and Firefox 3.5.3 can be downloaded here.