Mozilla Firefox has been updated to v3.6.3. This release fixes a critical security issue according to Mozilla Foundation Security Advisory 2010-25:

Title: Re-use of freed object due to scope confusion
Impact: Critical
Announced: April 1, 2010
Reporter: Nils (MWR InfoSecurity)
Products: Firefox

Fixed in: Firefox 3.6.3

Description:

A memory corruption flaw leading to code execution was reported by security researcher Nils of MWR InfoSecurity during the 2010 Pwn2Own contest sponsored by TippingPoint’s Zero Day Initiative. By moving DOM nodes between documents Nils found a case where the moved node incorrectly retained its old scope. If garbage collection could be triggered at the right time then Firefox would later use this freed object.

You can update your version through Firefox’s internal updater by opening Firefox and selecting Help > Check for Updates. You can also get the full download here.

Our favorite internet browser, Firefox, has been updated to v3.5. You can update your version of Firefox by opening Firefox and selecting Help > Check for Updates.

Firefox 3.5 is based on the Gecko 1.9.1 rendering platform, which has been under development for the past year. Firefox 3.5 offers many changes over the previous version, supporting new web technologies, improving performance and ease of use. Some of the notable features are:

• Available in more than 70 languages. (Get your local version!)
• Support for the HTML5 <video> and <audio> elements including native support for Ogg Theora encoded video and Vorbis encoded audio. (Try it here!)
• Improved tools for controlling your private data, including a Private Browsing Mode.
• Better web application performance using the new TraceMonkey JavaScript engine.
• The ability to share your location with websites using Location Aware Browsing. (Try it here!)
• Support for native JSON, and web worker threads.
• Improvements to the Gecko layout engine, including speculative parsing for faster content rendering.
• Support for new web technologies such as: downloadable fonts, CSS media queries, new transformations and properties, JavaScript query selectors, HTML5 local storage and offline application storage, <canvas> text, ICC profiles, and SVG transforms.