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Mozilla closes security hole with Firefox 3.5.1

The first patch to the new open-source browser fixes a critical security vulnerability and makes some other adjustments.

Stephen Shankland Former Principal Writer
Stephen Shankland worked at CNET from 1998 to 2024 and wrote about processors, digital photography, AI, quantum computing, computer science, materials science, supercomputers, drones, browsers, 3D printing, USB, and new computing technology in general. He has a soft spot in his heart for standards groups and I/O interfaces. His first big scoop was about radioactive cat poop.
Expertise Processors, semiconductors, web browsers, quantum computing, supercomputers, AI, 3D printing, drones, computer science, physics, programming, materials science, USB, UWB, Android, digital photography, science. Credentials
  • Shankland covered the tech industry for more than 25 years and was a science writer for five years before that. He has deep expertise in microprocessors, digital photography, computer hardware and software, internet standards, web technology, and more.
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Stephen Shankland

Mozilla updated Firefox to version 3.5.1 for Windows, Mac, and Linux on Thursday, fixing a security problem, improving stability, and speeding launch time on some Windows systems, according to the release notes.

"We strongly recommend that all Firefox 3.5 users upgrade to this latest release," browser director Mike Beltzner said in a blog post Thursday.

Firefox 3.5 embodies Mozilla's hope to build a better foundation for Web applications, but about two weeks after its debut, a vulnerability in the browser's JavaScript engine came to light. Mozilla rated it "critical" because an attacker could create a Web site that would run malicious code on the computer.

The new version can be installed from Mozilla's download site or by selecting "Check for Updates" in the Help menu. Unfortunately, when I did so, the Firefox warned me that the newly updated Gears 0.5.29.0 plug-in from Google becomes incompatible again.

Update July 17 1 p.m. PDT: A patch to fix the Gears compatibility issue is under way.