Mozilla on Tuesday upgraded Firefox to version 70, enhancing its anti-tracking technology with new blockers that automatically stymie social media trackers and compiling reports so users can see what spying the browser has stopped.Security engineers at Mozilla also included patches for 13 vulnerabilities, one marked "Critical" and three marked "High," the organization's two top threat ratings.

The critical flaw was described as "memory safety bugs," a label that's present in virtually every Firefox upgrade's patch list.

"Some of these bugs showed evidence of memory corruption and we presume that with enough effort some of these could be exploited to run arbitrary code," Mozilla wrote in the accompanying security advisory.