Firefox Takes Up Too Much Memory
I am primarily using Firefox as my web browser. I have noticed that after some tabs having been opened and closed the memory usage of Firefox becomes larger and larger.This fact often leads me to crash it (deliberately using the task manager) and to open it again selecting only some of the tabs I need. There are cases where I open all my previously open tabs. The funny thing is that even in this case, the memory usage is by far less than what it was before shutting Firefox down.So my question is why is this happening? Why does the closing of the tabs not help (at least not that much)?
Is there a way to reduce the memory usage without shutting Firefox down? RAM cannot be saved for later. Your only choices are to use it or waste it.
A system with 8GB of RAM can't use 4GB today in order to use 12GB tomorrow.So, simply put, Firefox is using more memory because the alternative would be to waste that memory. It is not returning to the initial level because it would take effort to do so and there would be no benefit to expending that effort.The fact is that firefox sometimes uses upto 2Gb of memory which does not seem reasonable for the number and content of tabs being open.It's perfectly reasonable if the alternative is to have some of that RAM be wasted and holding no data whatsoever. At a minimum, it allows Firefox to use up to 2GB of memory without having to allocate any more memory, which is a win. Freeing and allocating memory takes effort. Smart systems only expend effort when there's some expected benefit. They certainly don't do work that they'll probably just have to undo later.Modern operating systems go out of their way to have as little free RAM as possible. Free RAM is forever wasted.
If you had 1GB free for the last hour, you gained no benefit whatsoever from that 1GB in that past hour. If you're thinking, 'I want that RAM free now so I can use it later', forget it.
Firefox Uses Too Much Memory Fix
Extensions and themes can cause Firefox to use more memory than it normally would. To determine if an extension or theme is causing Firefox to use too much memory, start Firefox in Safe Mode and observe its memory usage. In Safe Mode, extensions and themes are disabled, so if you notice a significant improvement, you can try disabling or uninstalling extensions. Browser Uses Too Much Memory - Solved Browser Runs Slow - Fixed Free Memory 2.0. That limits the memory usage of Firefox. Firefox uses too much memory (RAM) - How to fix Firefox uses too.
Why Is Firefox Using So Much Memory
You can use it now and use it later. There's no painful tradeoff to make here. @DavidSchwartz: this is complete nonsense.
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What the hell is 'directly transition the memory'? If memory is scarce, one application has to give so another can take (the alternative is the dreaded swapping.). 'Modern operating systems do this very efficiently' - do what?? They can get rid of code and library pages because they can be re-fected, they can play with the FS cache pages, but cannot take away memory that's normally used (e.g.: firefox storing a closed tab or images so they can be opened faster).–Jan 20 '15 at 11:09.
1 for exactly the same reason as @KarolyHorvath. On a 4 GB machine (which is only 'less-that-average' nowadays), FF taking 2.5 GB of resident memory (I'm on Linux) is unreasonable, because it takes memory away from other applications.
When I close several tabs, I expect FF to release the now unused memory, so that other applications, or the kernel itself for that matter (which likes to cache aggressively, greatly increasing overall performance) can use it. This is the archetypal developer/sysadmin dispute, if you don't need the memory anymore, release it, you're not alone on that system.–Apr 19 '15 at 22:02. You seem to be arguing that it's okay for Firefox to bloat up to 2Gb because that memory is just swap and so other programs are not prevented from having that 2Gb. This is false. Most of that 2Gb is dirty pages which have to be flushed. Moreover, when Firefox decides to run some garbage collection on that cruft, it has to be paged back in: and that will happen in some random order that causes seeks all over the place on a conventional spinning hard drive. Not writing 2Gb to disk and reading it back is demonstrably more performant than doing so.–Aug 12 '15 at 19:50.
Hate to admit this but sometimes I really suspect the slowness of my browsing experience comes from heavy memory usage by my Firefox, and there is nothing to replace good-o-firefox. I need to open too many tabs and cannot afford buggy Internet Explorer. I’ve tried it and think it helps a lot.How to reduce memory usage in Mozilla Firefox.
Type about:config in the Firefox address bar. Search for browser.sessionhistory.maxentries. Double click on the value 50, change it to something lower, 5 should be good.ExplanationsAveragely we surf less than 5 of the websites we previously surfed before, there is no need to usage up that much memory (which is 50 by default).