Here is a scrpt I did some time ago. Firemin reduces the memory Firefox uses. I know that Windows will also periodically scan running processes and tell them to release their unused memory. You could argue that this makes Firemin unnecessary, and you would be spot on. However, It is my opinion that Windows does not clean out memory as often as I would like it to. Firemin runs the clean memory API call a few times per second. The method Firemin uses to decrease Firefox memory usage is not proven and the debate over if it works or not will go on until the end of time, but here is my opinion; If Firemin works for you, use it and if it does not, delete it! You can download Firemin and Source Code at: https://www.rizonesoft.com/download/firemin/ or view the script below: Firemin.au3