As Firefox grows in popularity, white-and black-hat hackers are poking around more intently in search of security holes. One result: Firefox 3 has released two different patches in the past two months. The second, version 3.0.4, fixes four sets of newly discovered bugs that the browser's volunteer devel¬opers rank as critical.

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The update fixes holes in the browser's engine, in its session restore feature, and in two network functions. The only work around prior to the update was to disable JavaScript, which would have caused many sites to stop working properly. De¬pending on your version of Firefox, download version 3.0.4 (or 3.0.5, released at press time) or .0.0.18 to get the fixes.