Firefox 3.5.2 was released on August 3rd. This release addresses 3 security vulnerabilities, 2 labeled as critical by Mozilla that were disclosed last week at BlackHat /Defcon security conferences. Among stability improvements, it also brings proper ICC profiles rendering.
Auto-updates should be occurring in the next 24-48 hours, otherwise users may get the latest update by going to Help menu and selecting Check For Updates. Also, a reminder from Mozilla Developer Network, If you’re still using Firefox 2.0.0.x, this version is no longer supported and contains known security vulnerabilities. Please upgrade to Firefox 3.5 by downloading Firefox 3.5.2 from http://www.firefox.com.
Source: Mozilla Links