I'm having problems with Firefox consuming too much RAM memory. Several people are complaining about this but I did some further research before posting here, using about:memory, and I found out that js-non-window and js-main-runtime are causing this. When I start up a blank Firefox session I immediately have an allocation of 260MB of RAM. About 75-80% of this is taken up by those two js (javascript?) processes. After opening about 10 tabs with different webpages the RAM usage has gone up to about 750MB. During the time the tabs are open most of the extra MB's are consumed by the window-objects (40MB per page, still seems quite a lot to me for just a news site with one article...) but after closing them the memory usage didn't go down and it transferred to the two already mentioned js processes. This transfer to the js processes is not always the case, it seems to happen only if I open a lot of tabs, let's say 10+ perhaps. I tried disabling Javascript using the plugin SettingSanity, but this makes browsing quite uncomfortable of course and worst of all it doesn't solve the problem. The mentioned processes keep using the same amount of RAM. I have this exact same problem on all my computers and laptops so it can't be a coincidence. Is there nothing I can do about this? Is this under investigation? How can a browser with 10 web pages open need almost 800MB of RAM? And please don't answer "install more RAM". The pc I have most problems with has 2GB of physical RAM and I really do think that opening 10 web pages should be possible on such a computer. Doing the same in Internet Explorer consumes less than half the amount of RAM memory. P.S: I sent this query using IE because I could't get to this page in Firefox. The "Ask This" button didn't work...