the newest update of 16 november 2023, since this update my pc uses 99.98% of the 16gb of ram, it ramps up till it uses just about all ram, as soon as you disable AdBlocker Ultimate in firefox/mozilla, it instantly drops off and the ram sits back to its normal amount usage between 2 to 4gb, i have had this same problem by the same adblocker twice before, not good when it hogs the ram and nothing has been done to fix it
