Firefox released Firefox 7 yesterday (it's not a biggie as they're releasing a new version in every 6 weeks now), but seems to be a big change this time: "Firefox 7 now uses much less memory than previous versions: often 20% to 30% less, and sometimes as much as 50% less. This means that Firefox and the websites you use will be snappier, more responsive, and suffer fewer pauses. It also means that Firefox is less likely to crash or abort due to running out of memory. These benefits are most noticeable if you do any of the following: - keep Firefox open for a long time; - have many tabs open at once, particularly tabs with many images; - view web pages with large amounts of text; - use Firefox on Windows - use Firefox at the same time as other programs that use lots of memory." Code: http://hacks.mozilla.org/2011/09/firefox-7-is-lean-and-fast/ Full list of what's new in the latest release: Code: https://www.mozilla.org/en-US/firefox/7.0/releasenotes/ Do you experience significant drop in memory usage with the latest version of Firefox?