Firefox 3.6.9 has been released!
Firefox 3.6.9 Release Notes
Under What's New they state:
Firefox 3.6.9 fixes the following issues found in previous versions of Firefox 3.6:
* Introduced support for the X-FRAME-OPTIONS HTTP response header. Site owners can use this to mitigate clickjacking attacks by ensuring that their content is not embedded into other sites.
* Fixed several security issues.
* Fixed several stability issues.
Under Security Issues they state that the below have been fixed in Firefox 3.6.9
Fixed in Firefox 3.6.9
MFSA 2010-63 Information leak via XMLHttpRequest statusText
MFSA 2010-62 Copy-and-paste or drag-and-drop into designMode document allows XSS
MFSA 2010-61 UTF-7 XSS by overriding document charset using <object> type attribute
MFSA 2010-59 SJOW creates scope chains ending in outer object
MFSA 2010-58 Crash on Mac using fuzzed font in data: URL
MFSA 2010-57 Crash and remote code execution in normalizeDocument
MFSA 2010-56 Dangling pointer vulnerability in nsTreeContentView
MFSA 2010-55 XUL tree removal crash and remote code execution
MFSA 2010-54 Dangling pointer vulnerability in nsTreeSelection
MFSA 2010-53 Heap buffer overflow in nsTextFrameUtils::TransformText
MFSA 2010-52 Windows XP DLL loading vulnerability
MFSA 2010-51 Dangling pointer vulnerability using DOM plugin array
MFSA 2010-50 Frameset integer overflow vulnerability
MFSA 2010-49 Miscellaneous memory safety hazards (rv:1.9.2.9/ 1.9.1.12)
I was offered the update through the Firefox Software Update feature.
[Thread and post edited to reflect release of 3.6.10 right after 3.6.9.]
UserAgent: Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.9.2.9) Gecko/20100824 Firefox/3.6.9 GTB7.1 ( .NET CLR 3.5.30729)



