The title of the post may seem to be very funny. Firefox has been a very good browser and the new engine was performing well. I installed this beta 3 and it was all going fine until I noticed that the entire OS gets stuck at times, not even responding to keyboard. When it got stuck this time, I took some screenshots of Windows Vista task manager window. I was shocked to see Firefox using 600MB RAM and by the time I took the screenshot, it was using around 590MB. I was only using one Firefox window with five tabs open. See the screenshot below:
Even though it was using 500MB on my Vista Home Basic, I just restarted the application and it was working fine. This is the only issue have seen apart from the ones mentioned in the “Known Issues” in beta page. If any of you happen to be contributing to Firefox development, I request you to report this and get it fixed. BTW, I know that these kind of issues are expected in beta versions, but 600MB is too much, for a product of Firefox’s standard and reputation.
Thank you for your time.


Firefox is outsmarting itself!
I have been a user of FF since near the beginning but I have to say that now that I am on beta 3 I have now switched over to the former enemy IE7. FF is now slower, does not load very well and a host of many issues. Although the security is better there is not a lot to get excited about in FF anymore, IE7 loads better, cleaner and faster, sorry but there it is. IE7’s only problem remains security. Unless this is not the finale to FF and it does not improve over what I have been experiencing it is goodbye to FF and it now boils down to just a lot of hype and of course hating anything Microsoft. bob
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I couldn’t agree more. Firefox is great but it does not need to be such a memory slob. Fix it, Mozilla! sheesh.
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@bob & doug,
I think the real war is yet to begin. I feel that FF has an edge over IE. i have used IE8 beta also, which does not work that great. It has crashed more often than the FF beta. But they are also improving.
Let us wait and watch….
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I have been using firefox since version 1.5 i think i it always has been better than ie come on Ie is so bad that even the american governament has urged pople to stop using due to security reasons also IE slowns down average worldwide speed of the internet in about 20% (for reference http://www.stopie.com)
but i just also cougth my firefox with using 600mb of ram i think is some sort of bug that keepsa accumulatin resourses on the system and not using them cause if you restart the browser it is fast like always
ps i have firefox 2.0 and the beta firefox 3 version on my pc maybe that is why there is such a hog in my ram because using firefox 2 i have nerver see it go upwards of 250 wich is still a lot i mean firefox does a lot but in the end is just a browser… a lot of pople never close thier browsers so it should use less ram…
i sitll think i migth be some secret ms kink i nthe system to make it slow when using firefox and so most pople return to ie…
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Hello Cabronbr, I have seen that Firefox 2.0 also using more and more memory if I use the browser for more time, say, four hour continuously. It then really slows down the system. Later if I restart the browser, everything works fine. Had it been, IE then I would have been forced to restart my PC
. Anyway, FF is a great Browser and is really improving as it develops. BTW, have you used IE 8 beta?
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Hello webmaster
I would like to share with you a link to your site
write me here preonrelt@mail.ru
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Hi ,
I am using FF for last few years and it always run quite well but now with FF 3.x its taking too much memory on my machine (+ 600MB) and CPU of 40-50 %. I am quite disappointed with FF
. I think I should try google’s chrome..anyone knows abt the chrome’s performance?
Cheers,
Kapil
http://www.makeurownrules.com
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@Kapil,
I observed this problem with FF3 Beta. I can not believe the fact that this issue is still unaddressed.
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i am shocked that this issue is still happening even beyond the beta. i am using firefox 3.5 final release with all updates(12-10-09) and my firefox is still using up to and around 600mb.
and no for you guys wanting to try google chrome.. it does not help. google chrome is actually worse!!! not only did the main program use about 500-600mb but it also spawns 3 other processes(ctrl+alt+del) that use around 20-50mb each. google chrome requires 4 processes, all memory eaters, to run the tiny browser.
i never had a problem with firefox 2.0 to 3.0 and they were just as fast as 3.5
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