It runs the clean memory API call a few times per second. However, It is my opinion that Windows does not clean out memory as often as I would like it to.

You could argue that this makes Firemin unnecessary, and you would be spot on. Windows will also periodically scan running processes and tell them to release their unused memory. Enter Firemin simply put, It will attempt to eliminate Firefox memory leaks and decrease the amount of memory Firefox uses. Rather than a complaint about it, It decided to fix it. In a memory leak, you’ll see the memory usage keep increasing the longer the program is open/in-use and this is exactly what happens with Firefox. It’s quite normal for Firefox to be sucking up over 250MB of memory right off the bat.

Although Mozilla Firefox's memory usage improved a little over the last few years, it still uses a lot of memory a little more than I feel comfortable with.

With Firemin you can easily and dramatically optimize your Web Browser memory! One of the biggest “improvements” that Mozilla claims are the Firefox memory usage, in particular, the vanquishing of memory leaks.

For mac instal Firemin 9.8.3.8095