Mozilla Released Firefox 22 for desktop and mobile on Tuesday, June 25th. Several new features and updates are included in this release. Take a look at the Release Notes for more information.
Also released was an update for Firefox 17esr (Firefox for Organization) with 17.0.7esr. The Firefox esr update only contains bug fixes and security/stability updates.
Depending on the operating system and update settings (Tools > Options… > Advanced > Update Tab), users will be prompted to update within in the next 48-hours. Windows users can also go to Help > About Firefox and click the Check for Updates button. Users may also manually download and install Firefox via getfirefox.com. The next scheduled releases will be Firefox 23.0 and 17.0.8esr on August 6th, 2013.
Edited to correct version numbering for August 6, 2013 release.