Mozilla identified some security vulnerabilities with Location object issues in Firefox 16.0.1. The 16.0.2 update addresses said vulnerabilities. Firefox 15 users are not affected by these vulnerabilities. Existing Firefox 16.0.x users can updated to 16.0.2 via Help > About Firefox or download and install Firefox 16.0.2 manually via the getfirefox.com site.An update for Firefox 16.0.2 for Android has already been pushed out to Google Play Store.