Mozilla has released the next scheduled update for Firefox on both mobile and desktop. Firefox 19 was released on February 19th, 2013 and now includes a built-in PDF-viewer. For a complete list of improvements and fixes, see the release notes. Depending on their update settings (Tools > Options… > Advanced > Update Tab), users will be prompted to update within in the next 48-hours. Users can also go to Help > About Firefox and click the Check for Updates button or go to getfirefox.com and manually download and install Firefox. Also released was Firefox 17.0.3esr (Firefox for Organizations). The next scheduled release will be Firefox 20 and 17.0.4esr on April 2nd, 2013.