Firemin

Name: Firemin
Author: Rizonesoft

A small Windows utility that reduces the memory usage of Firefox and other web browsers.

Open source (GPL-3.0-or-later)By Rizonesoft

Free Open sourceWindows

Official websiterizonesoft.com

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View the Firemin source code

1 more way to get Firemin

MajorGeeksmajorgeeks.com

Run by third parties, not by Rizonesoft. Prefer the official page above when it works.

Alternatives

Windows Memory CleanerWindows Memory Cleaner is a portable open-source tool that frees RAM held by any program through native Windows APIs, rather than focusing on browser processes.
Wise Memory OptimizerWise Memory Optimizer is a free, closed-source one-click memory cleaner that also empties standby memory, acting on the whole system rather than browsers alone.
Intelligent Standby List CleanerA small Windows utility that watches the memory standby list and clears it when it grows too large.
Mem ReductMem Reduct frees system memory on demand with a real-time usage display, covering the whole system rather than targeting browsers, and it is closed-source freeware.
SpeedyFoxA one-click tool that compacts the SQLite profile databases of Firefox, Chrome and other apps.
The Marvellous SuspenderAn open-source Chrome extension that suspends inactive tabs to free memory, with no ads or tracking.

See all alternatives

About Firemin

Firemin is a lightweight Windows tool from Rizonesoft aimed at browsers whose memory use keeps growing during long sessions, often because of memory leaks. It works on Firefox and other browsers, trimming their memory usage so the rest of the system stays responsive.

It suits people who keep a browser open for days with many tabs on a machine with limited RAM. The source code is published on GitHub under the GPL.

Strengths

Targets memory growth in long browser sessions
Works with Firefox and other browsers
Lightweight and open source

Limitations

Windows only
Trims memory rather than fixing the browser's underlying leaks

Details

Pricing: FreeFree and open source under the GPL-3.0 licence.
License: GPL-3.0-or-later
Developer: Rizonesoft
Platforms: Windows
How it runs: Downloadable app
Account: Not required
Works offline: Yes
Best suited for: Windows users on low-RAM machines who leave a browser open for long periods
Categories: System utilities
Last verified: October 2, 2026
Added: October 2, 2026
Sources: rizonesoft.com/downloads/firemin

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