The Mozilla Foundation said last week it has patched several serious security flaws in the popular Firefox browser, bugs that also affect the SeaMonkey browser and the Thunderbird e-mail application.

The bugs could allow an attacker to take over a system, as well as less serious exploits such as spoofing or security bypass, Mozilla said.

While browser bug patches, even for critical flaws, have become somewhat routine, the latest alert highlights the fact that Firefox no longer has as clear an advantage over Microsoft's Internet Explorer as it once did.

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