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Contrary to many statements that Firefox 5.0 is RAM optimized and uses less, i still have Firefox eating almost ~800MB of RAM and mapping more:

enter image description here

I used command:

about:memory

And was presented with a modules/extension tree and i don't understand what each means. Does anybody here have experience or knowledge about this here who could tell me where may be the problem?

Plugins installed

Extensions installed

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I guess the first question is, how much ram usage did your old firefox install use ? – Sirex Aug 23 '11 at 12:51
Also what extensions do you have installed? – Col Aug 23 '11 at 13:16
Question updated. Firefox always used more than 600MB of RAM on my old machine and new machine. – Boris_yo Aug 23 '11 at 15:41
Maybe try Firefox 6? – Russ Warren Aug 23 '11 at 17:09
I always try new versions and problem seems to stay. – Boris_yo Aug 26 '11 at 6:19
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