Firefox tweaks
I’m probably WAY behind the curve on this. I’m sure everyone has seen these fixes and implemented them. But I just looked ‘em up and applied them. Wow!!! What a difference. One was for Firefox and one was for both Firefox and Thunderbird. And both have made noticeable changes.
To apply these tweaks (if you haven’t already), open up a new tab and type about:config in the address bar.
1. Right-click and select New > Integer. Type in browser.cache.memory.capacity and give it a value of 16384 for 16MB or something else around that.
2. Right-click and select New > Integer. Type in config.trim_on_minimize and give it a value of false.
The second one can also be applied to Thunderbird. Before applying this tweak, when I had Thunderbird minimized, it used over 20MB of memory … just sitting there. After I applied it, it went down to around 4MB when minimized. Right now, it’s up to 8MB, but that’s still quite a bit lower than before. And when I minimized Firefox, I got around the same result. Nice.
Just wanted to share in case there are other people out there who are a little behind the times, like I am. 
okay 
GH