Having looked into this issue and done far too much reading on it, there is finally a real workaround that trims down your memory usage.


How To Stop The FireFox Memory Leak
1. Open Firefox and go to the Address Bar. Type in about:config and then press Enter.
2. Right Click in the page and select New -> Boolean.
3. In the box that pops up enter config.trim_on_minimize. Press Enter.
4. Now select True and then press Enter.
5. Restart Firefox.

As of this writing my Firefox is at 189MB.
I just minimized and it dropped down to 8MB.
After maximizing it memory usage jumped up to 40MB.

I’d say that this is definitely going to help until the Firefox Devs can track down all the core memory leaks.