Mozilla released Firefox 25 on October 29, with the usual lack of any kind of announcement. I was alerted to the new version via posts on the SANS ISC Diary and the CERT alerts list.
The only thing even close to an announcement of the new version from Mozilla is a blog post from the 29th that describes one of the new features in Firefox 25. The blog post never even mentions the new version.
The version 25 release notes list the changes in this version, which consist of several security vulnerability fixes, a few other bug fixes, Web Audio support, and some CSS and HTML standards tweaks.