Firemin is a tiny tool that's been designed to minimise Firefox's RAM use.
The program couldn't be any simpler to use. Download it, unzip the file, run Firemin.exe - and you could stop there. No installation required, no settings to configure, Firemin simply runs in the background, looking for the Firefox.exe process and, if it's there, uses Windows API calls to reduce the browser's memory consumption.
It worked for us, too, drastically reducing RAM consumption.
But there is a catch. Firemin must run all the time (while you're using Firefox) to do its work, and Windows also has to spend extra time swapping RAM out, and bringing it back when necessary.
Fortunately this probably won't make much difference. And if there's an issue you can address it a little in the program's options, reducing Firemin's CPU usage at the expense of accepting extra Firefox RAM consumption.
Verdict:
Firemin will instantly save you more than 100MB of RAM, and maybe much more, but also increase your hard drive activity and CPU usage. It may still be useful if you're short on memory, though - try it and see
Your Comments & Opinion
Improve the performance of Firefox with just a couple of mouse clicks
Improve the performance of Firefox with just a couple of mouse clicks
Improve the performance of Firefox with just a couple of mouse clicks
Stop Firefox’s memory leak from spiralling out of control with this handy add-on
Improve Window's cache file and memory management to enhance performance
Major update to the portable version of the popular email client, but with a limited number of new features
Bypass screen savers or other "idle detection"-based programs by faking mouse input
Have your PC read the text of Word, PDF, EPUB and other files
Completely remove Norton security software in just a few minutes
Put your monitor to better use with multiple virtual desktops