Mozilla release an emergency update for Firefox 32.0 on September 12th, 2014 with Firefox 32.0.1. This release addressed these bugs:

• Stability issues for computers with multiple graphics cards
• Mixed content icon may be incorrectly displayed instead of lock icon for SSL sites
• WebRTC: setRemoteDescription() silently fails if no success callback is specified

Please see the release notes for full details.

Depending on update settings, users will be prompted to update to version 32.0.1 or can do so via Help > About Firefox or going to getfirefox.com where they can download and manually install the latest version of Firefox. The next planned release will be Firefox 33 on October 14, 2014.