For those suffering from excessive RAM usage by Firefox, this temporary hack seems to do the job.

This little fix will move Firefox to your hard drive when you minimize it, and as a result it will take up less than 10MB of memory while minimized. So far, from my experiences with using this today, when you maximize Firefox it will obviously increase the memory usage. However, it does not seem to go back up to the insane amount that it was at before minimizing it. For example, Firefox was at 180MB of memory usage and then I minimized it and after a few seconds I maximized it. After maximizing it and continuing on my routine business it appeared to only have gone up to 60MB. This seems to be a good solution for me right now since I frequently maximize and minimize Firefox anyways.

I just made the change and am about to restart the ‘Fox… fingers are crossed.