The popular web browser released a major update on August 8, version 55, which — in addition to some nifty new features, like Virtual Reality support — includes a number of security fixes. Firefox 55 remediates three critical and 11 high-impact vulnerabilities, as well as seven moderate and six low-impact vulns.
Of the critical and high-impact vulnerabilities fixed, several of them would have allowed an attacker to crash the browser, execute arbitrary code, or even access sensitive information on a page the user was reading. A few days after the 55 release came its first minor update, 55.0.1, which includes a few additional bug fixes.