Firefox 13 was sent to the release channel today by Mozilla. Included in the update are five (5) critical, two (2) high, and one (1) moderate security update.

Security Updates Fixed in Firefox 13

  • MFSA 2012-40 Buffer overflow and use-after-free issues found using Address Sanitizer
  • MFSA 2012-39 NSS parsing errors with zero length items
  • MFSA 2012-38 Use-after-free while replacing/inserting a node in a document
  • MFSA 2012-37 Information disclosure though Windows file shares and shortcut files
  • MFSA 2012-36 Content Security Policy inline-script bypass
  • MFSA 2012-35 Privilege escalation through Mozilla Updater and Windows Updater Service
  • MFSA 2012-34 Miscellaneous memory safety hazards

What's New

An interesting new feature is the change when opening a new tab. Where it was previously a blank space, the new tab now has a feature like Internet Explorer 9 and the other major browsers. Where IE9, for example, includes links to "Your most popular sites", Firefox 13 now displays tab views and links to "most visited pages".