After using Firefox for several hours, it begins consuming more than 500mb of memory.
Every time Firefox opened
== I began using Firefox 3.3.6
Try the suggestions in Firefox uses too much memory (RAM) - How to fix. Most of the time, high mem usage is due to plugins like Flash, so if you hold on for a week, Firefox 3.6.4 will include a feature that separates plugins from firefox.exe. :-)
Firefox has always been terrible for memory leaks along with errors such as "Script: chrome://global/content/bindings/browser.xml:0".
This is regardless of plugins installed and Re-installing firefox once per week makes it no better either.
I'm on latest version 3.6.3 using Windows 7 x64, Intel I7 4ghz CPU, 6Gb or Ram, more than 50% free space on all my 6 HDDs.
I have 3D rendering applications that run faster with less problems than FireFox.
I wish they would sort it out.
I think you'll find that FF, plain wrap, doesn't leak - in general, it is the add-ons.
I had time today to diddle with mine as my CPU usage was unacceptable, but didn't want to go back to Safari as I love all my favorite helper add-ons in FF that make my browsing my enjoyable.
In my case, the only culprits that I found were FoxyTunes and CoolPreviews. For any other user that may read this, I was able to fix the leak in CoolPreviews by downloading today's update which also has a fix for the PacMan alarm siren that went off if you went to Google today and had CP enabled.
I found the following webpage very helpful to start:
Problematic extensions - MozillaZine Knowledge Base http://kb.mozillazine.org/Problematic_extensions
If you want to test all of your add-ons, you can start in SafeMode (hold down the OPT key when starting FF) and disable them all. In my case I just started down the list, enabling several at a time to make the chore faster.
I know the AVG add-on is also a conflict, I will have to turn them off when I get back to the Win machines at work.
You might also check your plugins.
The memory leak is ridiculous, to the point of making the browser essentially unusable.
The Add-on-causation hypothesis nonsense is absolutely untrue - I have been testing Firefox for more than a year, and it is without a doubt the most unstable browser out there (and that, gasp, includes IE8).
The MAIN PROBLEM seems to be that people who do not experience the memory leak/freeze/crash issues with FF don't tend to operate many tabs at once, maybe a dozen or so. Additionally, they seem to turn off their browser/computer more often, enabling cache clearing on all levels.
Those like myself however, who operate up to 50+ tabs at a time, never restart my machine, AND only restart FF when it crashes (which is often) are suffering tremendously from this problem with the browser, which release after release, has gone unrepaired.
Once again, the add-ons are not the true cause of this problem, some add-ons/plugins do indeed make the problem worse (like shockwave), but even with everything off, the instability is rampant.
There is an inherent coding problem with Firefox software (and perhaps its relation to Windows?) which is causing this. Continually claiming there are workarounds is not an acceptable solution.
This problems are not, in 99,9% of the cases, Firefox's fault. Rather, they are caused by problematic add-ons or third party software. But you do need to diagnose what your exact problem is. Do this:
Ok, if disabling all extensions and plugins through safe-mode didn't work to bring Firefox's CPU and RAM usage to good levels, then you have different issue. The most likely scenario is that you have a third party software running on your computer that is messing with Firefox. Do as follows: