Firefox v.23.0.1 was offered to release channel users on August 16, 2013.
Fixed in Firefox 23.0.1 
* Rendering glitches on H.264 video only in FF23 on Vista (901944)
* Spellchecking broken with non-ASCII characters in profile path (902532)
* Audio static/”burble”/breakup in Firefox to Firefox WebRTC calls (901527)
No security updates in Firefox 23.0.1 
Evaluation: Update if affected by one of the listed issues or wait for v24.0.
 Firefox features [Mozilla]
 Mozilla Firefox 23.0.1 Release Notes (2013-Aug-16) [Mozilla]
 Security Advisories for Firefox [Mozilla]