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August 10, 2011 / David Bleeker

Mozilla shrinks Firefox’s memory appetite by 20%-30%

Mozilla’s Firefox 7, slated to ship in late September, will be significantly faster because of work done plugging the browser’s memory leaks, a company developer says.

Mozilla developer Nicholas Nethercote credited the “MemShrink” project for closing memory bugs in the browser and producing a faster Firefox.

“Firefox 7 uses less memory than Firefox 6 (and 5 and 4): often 20% to 30% less, and sometimes as much as 50% less,” Nethercote said in a blog post Tuesday. “This means that Firefox 7 is faster (sometimes drastically so) and less likely to crash, particularly if you have many websites open at once and/or keep Firefox running for a long time between restarts.” [read more]


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  1. Eric / Aug 10 2011 11:12 am

    That’s pretty awesome. I never noticed the memory leaks. I guess it’s if you load too many tabs or something.

    Thanks for passing that along!

    • David Bleeker / Aug 11 2011 7:20 pm

      You’re welcome. When I develop code I sometimes have as many as fifteen tabs at a time. Things start to slow down over time, so much so that i switched to Safari. Figured it was good enough.

      I am looking forward to trying the new version.

      BTW, great writing on your blog!

      • Eric / Aug 13 2011 2:17 am

        Thanks a lot, I try to post once a week. I’ve been having some nice topics flow through recently.

        If you want something all-in-one, use Google Chrome. Pretty much has everything you need to get web pages up and running. Running 15 isolated Chrome sessions is pretty helpful too since when one crashes, it doesn’t crash all of them.

        Good luck coding!

      • David Bleeker / Aug 13 2011 7:33 am

        The next version of Google Chrome looks interesting given that it will be able to run native apps… I keep trying out different browsers to see how they perform. My reason for landing on Safari is that it seemed to deal with Facebook’s idiosyncrasies.

        Thanks again, and keep in touch.

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