Mozilla Firefox 4 Improves Memory Use
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That is, Firefox 4 (to put it politely) was a memory hog.
That's no longer the case as the browser is set to exit development and become generally available on March 22.
One of the biggest memory leak issues was fixed in Firefox 4 Beta 12 and it has helped to make the release candidate version of Firefox 4, the snappiest Firefox ever made.
It sure did.
Fixing that one leak alone, isn't the only way that Mozilla developers have improved memory management and usage in Firefox 4.