Firemin missed the Firefox web browser to slim in terms of memory requirements. The displaced formerly known as Firefox Plumber Freeware eliminates the memory leaks that frequently occur in Firefox. The operation of Firemin is simple: In the options menu it is defined by a slide rule as aggressive Firemin optimizes the memory of Firefox. The more aggressive the freeware fighting the so-called memory leaks, the more CPU power is required for the clean-up work in RAM. On request Firemin increases automatically when Firefox work on. Firemin reliably monitors the memory requirements of Mozilla Firefox and so curbs the consumption of resources of the browser. Used properly, Firemin releases several hundred megabytes of precious RAM for other applications when using Firefox.