@fedops I also suspect it's something more localized. I reinstalled one of my workstations (which had been leaking RAM very badly under 24.04 for a few months) with 26.04 from scratch last night, and I've been using the default FF from snap since. It's behaved flawlessly so far. @felimwhiteley has this machine ever done an in place major OS version upgrade? I think one of those was the culprit for my 24.04 leaks on that one machine. None of my from-scratch systems have exhibited that problem.