I was using over 3,5 million kb of ram for just flashplayer and it was still building since last night, making FoE unplayable after 10 - 20 seconds.
Someone recommended a browser called 'Torch' (a Chrome derivative) I must say I'm well impressed, no memory leak even though every other browser leaked memory like a bucket with no bottom, and has been working sweet all day no problem once set up.
Tips:
Only use torch site to download, other sites have bundled crap warez.
http://torchbrowser.com/
On installing there are a couple of check boxes to uncheck at the beginning (make me default, etc)
And a couple on the finish install page to uncheck.
Get ad block extension as ads will send ram up ( as noticed on FoE wiki)
Has a nice feature of any video your watching just one click and it will download video and a separate audio (aac file) as well.
It's fast and light, might not go back to Firefox if this keeps up