One of the biggest “improvements” that Mozilla claims are the Firefox memory usage, in particular, the vanquishing of memory leaks. Although Firefox memory usage improved a little over the last few years, it still uses a lot of memory; a little more than I feel comfortable with. And for this reason, we created Firemin.

Programs on my computer can stay open and run for days or even weeks, and Firefox is no exception. Because of this Firefox was using over 3 GB of memory after a few days. It’s quite normal for Firefox to be sucking up over 250 MB of memory right off the bat. In a memory leak, you’ll see the memory usage keep increasing the longer the program is open/in-use and this is exactly what happens with Firefox.

What is Firemin?

Simply put, Firemin will attempt to eliminate Firefox memory leaks and decrease the amount of memory Firefox uses. All I did was tweak our Memory Booster a little and applied it to Firefox and this solved the memory leak issues.

Firemin vs. Windows Memory Management

Windows will also periodically scan running processes and tell them to release their unused memory. You could argue that this makes Firemin unnecessary, and you would be spot on. However, It is my opinion that Windows does not clean out memory as often as I would like it to. Firemin runs the clean memory API call a few times per second.

Firemin Build 4982 main screen

The method Firemin uses to decrease Firefox memory usage is not proven and the debate over if it works or not will go on until the end of time, but the logic remains; if it works for you, use it and if it does not, don’t use it. It is really that simple.

Download Firemin

Firemin comes in two flavors. A setup utility for installing Firemin to your computer and a portable version for running it straight from a memory stick or portable hard drive. The portable version will not write any settings to the registry or leave any traces on your computer.

I came to our attention that all of the language files in build 5069 is corrupt. We apologize for the trouble and request that you download the fixed Build 5082.

Download Firemin_5082_Setup.exe (1705076 downloads)
Portable (348752 downloads)
UpdatedSeptember 1, 2020
File Size3 MB
LicenseOpen Source
RequirementsWindows® 7, 8 / 8.1, 10 (32 and 64 bit)
Malware Scan

Other Builds Firemin_5082_Setup.exe (840988 downloads) (109206 downloads) Firemin_5065_Setup.exe (853143 downloads) (223973 downloads)

Recent Firemin Changes

  • Fixed: GUIOnEventMode and TrayOnEventMode options had unnecessary slow downs.
  • Fixed: Workarounds added to alleviate slow downs on Windows 10 1809 and later (OS bug/design change).
  • Fixed: About page Memory usage par display.
  • Updated support URL on the About page.
  • Improved Resolute Compatibility.
  • Updated Japanese Translation.


Firemin uses the exceptional Firefox 2005 icons by Jairo Boudewyn (weboso).

Firefox 2005 Icons
Firefox 2005 Icons by Jairo Boudewyn

Source Code

Download the Firemin source code from the GitHub Repository. To compile (build) the sources, you will need to download and install AutoIt Beta version or later. Download the AutoIt Script Editor (Scite) here to edit the source code.

230 thoughts on “Firemin

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  4. sh121 Reply

    Useless. It does free up RAM significantly, but does it at the expense of high CPU usage. As a result, the browser again becomes very slow, perhaps even slower than before.

  5. Stan Reply

    Interesting. On the 8.1 laptop, the working set has dropped so far down as to be inconsequential.
    The private bytes has stopped, effectively, at just a tad over 1GB. Normally, 2-3 days, shut down FF, run CCleaner, restart FF to keep it functioning as it approaches 3gb.
    I have found no way so far to delete private bytes, or bring it down without restarting FF with CCleaner in between.
    Right now on my XP64 Pro PC, and there is a big difference in how MicroSlime handles this. I never shut this machine off, unless a power outage does it for me. The private bytes has held for 3 months at 1.1GB, virtually the same as working set.
    If there is an earlier version of Firemin that works on XP, just tell me where and I’ll load it, just to see what it does.

  6. Stan Reply

    I just downloaded this on my 8.1 laptop using FF 52. It is the computer that just loads up memory (when private bytes gets to 2.5GB it about shuts down). We’ll see how it works.

    Now…my other machines are all XP-64 Pro….I don’t really have a FF issue at 52.0 (latest they have for XP, and one of the last ALL add-ons work in). Do any of your builds work on XP?


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  11. 大眼仔~旭 Reply

    I am a translator of Simplified Chinese. I have updated a new language translation. I hope you can add it to the new version. If the file cannot be downloaded, you can contact me directly by email, thank you for your work. Extraction code: ********

  12. Klaus Buecher Reply

    cam you do anything about pagefile size?

    My notebook has 2 GB RAM and 2 GB disk space on C. After one or two webpages, FF explodes the pagefile from 400MB (startup) to 1.6GB and more. Even when closing FF, that is never released. So I end up with an unusable system: FF fills the pagefile, free space on C goes to 0 and it stays 0 after closing FF and I have to reboot or try to work with 90MB free space.

  13. Pingback: Firefox: Firemin behebt unnötige Verlangsamung ab Windows 10 1809 |

  14. Tiger Mann Reply

    This is an awesome little app. I have been a Firefox user for 10 plus years as I love how you can customize it with the extensions/addons. Whilst other browsers also have these, firefox has the greatest number and IMO, the best. Of course with more extensions added means more memory usage so even with 16GB DDR4 RAM, it slows down over time. Firemin keeps this in check for me without having to restart the browser every hour so, Sure it is not the panacea to all the memory problems of Firefox but it is the best as it certainly helps and the easiest to use.

    Thanks, Rizonesoft

  15. Jan Reply

    Thanks !
    Firemin reduced Waterfox memory usage from 9GB (!!) to less than 100 MB (with my current settings).
    Even with 32 GB available, browsing was terribly slow.
    I had no memory issues with Edge, Chrome or Opera though. (but I liked Waterfox more).
    Now I’m trying to find good settings and enjoy browsing again..
    (If you ever want to do translations I offer my help for Dutch).

  16. denker Reply

    Can you adapt the program to work in multiple sessions?
    for example terminal server

    Checked it out. Works only on one user, when launched from another – does not work.

  17. Windthin Reply

    Firemin appears to have entirely stopped working. I look at it and it doesn’t do anything. I can’t even open Firefox using it. I am not sure what is wrong, but I suspect it’s a recent Firefox update that put it out of sync.

    • Derick Payne Post authorReply

      That’s strange. Firemin is independent of Firefox updates. It references the executables, so unless that changed, then it should work with all future updates. I will need to research this a little. Have you tried re-installing Firemin?

      Also, what version of Firefox are you using. I also need your Windows version and architecture (64bit or 32bit) if you can please. I need as much information as you can give me, so we can troubleshoot together.

  18. Jem Reply

    my Firefox generally started at using half a GB of memory and could go up to 4GB, it was always at the top of task manager (above discord, antivirus, etc), and this just. instantly knocked it down so much that half the time it doesn’t show up without scrolling, I actually have some free ram now

    I haven’t run it long enough to see about longer periods of time yet but it had such a dramatic effect literally on installing that I have to write this and I never write comments

    I had windows 10 eating half my ram and firefox kept going up to eating the other half, but now it can actually /function/, thank you so much

  19. Flavio Ramalho Reply

    I downloaded it. It runned withou any problem… By the way. I loved it (Windows 7)

  20. Matteo Reply

    Awesome piece of software, it runs like a breeze.
    I noticed it works against other processes too: I tried Teams.exe, Dropbox.exe and its “sons” (QtWebEngineProcess.exe) and the “Woking set size” is reduced significantly.
    There could be any issue running against these other processes?

  21. Japramarkentut Reply

    I’m running two firemin apps on my wife’s Celeron n4000 4GB Ram laptop.

    Firemin 5060 (installer) for my Opera,

    and Firemin 5065 Portable for my Firefox,

    Cool huh??

  22. Whovian Reply

    I have a question… Under the Extend Process and Performance tab there is a setting for normal high etc.. is that for the process of the program firemin itself? Thanks!

  23. Ale Reply

    i downloaded from Majorgeeks
    program work good for Pale Moon, path c:\program files\palemoon\palemoon.exe

  24. David Reply

    Hello, Jiangmin, a possible trojan was detected.

  25. Switchhazel Reply

    What are the recommended settings for a laptop with a SSD?

  26. Istana Reply

    Works for me with Firemin_5060_Setup.exe!
    1.2GB => 5MB
    I’m using FF v71.0.0.7275, on Win7.
    Thanks a lot!

  27. Legion Reply

    Really helps to prevent constant strangulation by Chrome, especially systems with low RAM to begin with.

  28. janmeijnaerts Reply

    I use Firemin for latest Firefox on Win7 64-bit. But if I compare the memory usage indicated in Fireman I cannot find any comparison withe the memory consumption of the different FF processes in Windows Task Manager

  29. Brain Crusher Reply

    Sometime do a good thing, sometime makes firefox or other process (if you put one in extended processes list) annoyingly slow. I suppose there are to be other criteria than just heap usage and garbage collector called by timer. But do things better in my case with settings 10000ms and 200mb.

  30. A15 Reply

    CPU usage gets a lot higher when using this app. This makes the browser slow, and that defeats the whole purpose.

  31. Franck Reply

    I use the latest Firefox with win7. All is ok at when running, FF’s memory is drasticaly reduced 🙂
    But there’s a sad bug which makes me disable Firemin : juste after waking up my pc from the extended hibernate mode (FF and Firemin were up before), FF freezes and I must kill it via the task manager 🙁 FF woks immediatly ok from hibernation when I disable Firemin. Any idea ?

    • meowth Reply

      I think that’s a firefox bug. On my incredibly slow laptop, Firefox freezes after hibernating

  32. fred Reply

    I use the latest Firefox with win7. All is ok in running mode, FF’s memory is drastically reduced 🙂
    But there’s a sad bug which makes me disable Firemin : keeping FF open (Firemin is still active too), I switch my pc to extended hibernate mode, and when I wake it up, FF is freezing and I must kill it via the task manager. So I can’t use Fiiremin 🙁 Any idea ?

  33. User Reply


    sorry, that I must say…..

    I think you are hacked!!!

    I load the file from “” (your actuell Link for download “Firemin_5060_Setup.exe”. When I like to install, I get the massge, that the file is corrupted and I shut load new. I do so for 3 times. Ever the same.

    When I check the file over, I found out, that I have now some Virus on my Sytem!!!!
    Thank you so mutch!!

    I´ve load the File over the Chip-Server and install that clean file.
    Not so good reputation for you. What do you think…… ????

    It will be nice, when you make a File to download for cleaning Windows-Systems from your Viruses.

    Your sincerey

  34. Pedro Augusto Santana Reply

    Hi… The Last build 5060 has currupt file installation…

  35. Zertyuoo Reply

    C’est vraiment efficace comme logiciel. Je suis passé de presque 2 go de RAM utilisée à 30 mo. Du coup pourquoi Firefox fonctionne aussi bien avec 2go de RAM utilisée qu’avec 30 mo et surtout pourquoi il ne se purge pas de lui même puisque visiblement les informations en mémoire ne sont pas indispensable?
    En tout cas merci d’avoir arranger ça c’est bien pratique.

    Your software is super efficient. I went from almost 2 GB of RAM used to 30 mo. Suddenly why Firefox works as well whatever the amount of RAM used and especially why it does not purge itself since obviously the information in memory is not essential?
    In any case thank you for arranging that it is convenient.

  36. Martin Reply

    Hello, and thanks for this great program!
    Is it possible to contact the developer?
    I tried in many ways without success… mail, telegram…

  37. Alex Reply

    Super great result! 1.3GB -> 60MB (reported by Windows Task Manager).

    • John Reply

      open firemin and click Extended Processes.. there you can add chrome.exe or any browser or applications with .exe file extension

  38. YuuNyaa Reply

    got it down from 85% usage to 56% with 5 tabs open. I only have 4gbs of ram and is saving money for an SSD and more RAM. Firemin is actually good! though I think it needs upgrading for the guys who have lower end CPU’s(since my i5 2310 still works well) especially since I noticed that there are spikes CPU usage when it dumps memory. overall Firemin is good

  39. Harold Reply

    Does constant mmory management cause hardware issues?
    Unnecessary wear and tear???

  40. rene Reply

    A good idea in principle but in practice it only eats my processor which goes up to 50%.

  41. Dave Reply

    Firemin set to Reduce FF memory usage to below 900 MB, Reduced every second.
    Firemin says “Process Usage is 732 MB, but Windows Task Manger says 2638 MB is being used.
    Given CPU temp. and fan operating speed and frequency, Windows Task Manager is obviously correct.
    WTF isn’t Firemin working as it should?

  42. Peter Reply

    I have 7 tabs open right now, and they use 3.7gb of my ram. :/
    I hope this fixes it.

  43. yonigo Reply

    Firemin is amazing, and I recommend it regularly to people who, like me, use older hardware (Thinkpads).
    Is there a 64-bit version of the latest update?

    • Derick Payne Post authorReply

      The 64-bit version is build into the installation file. It will automatically install it when a 64-bit Windows is detected. Or alternatively, the 64-bit version can be found in the portable package. Thank you for recommending Firemin, the support is appreciated.

  44. bekhan Reply

    Can’t download 🙁
    I’m in a loop, I click to download, go to Downloads page, click Firemin it brings me back to this page etc. Maybe the hotlink protection who doesn’t work proprely.


    Your description of Firemin is way too modest.

    Especially on Chrome (Windows 7), it stops the slow growing memory bloat in its tracks. Instead of seeing 200MB or more for several processes I see 20MB or 30MB. It hits 150MB when e.g., streaming a movie but as soon as the movie stops, it’s back down to 20/30 MB.

    I have had no problems with stability or interference with addons (using it a year or so) and it should be much more widely promoted for both Firefox and Chrome.

    If you made a version of Firefox using the Mozilla base, and a version of Chrome using the Chromium base, incorporated Firemin into both, and got them included in some of those “browser efficiency” comparisons you’d very quickly have the most downloaded and installed browsers.

    Maybe Mozillamin and Chromiumin?

  46. James Reply

    Your tools are AWESOME.
    Thank You.
    I cannot donate much but will tell friends about Rizonesoft’s greatness.

    • Mike Reply

      If it works for you, given the magnitude of the issue it’ll have resolved, it’s worth at least $50.
      If so, make some sacrifices and give the guy $50. Don’t be a low-life stingy tight-arse piece of filth like 95% of humans.

  47. Markus Geier Reply

    Dear Sir

    Thank you for your tool.
    I tried with Firefox Quantum latest release, but it freezes some websites.
    And till yet I couldn’t reach you!



  48. Markus Geier Reply

    Dear Sir

    I have troubles with Firemin and Firefox Quantum latest release.
    There are some Cloud-Websites hanging.


    Markus Geier

  49. Marcos Jacoby Reply

    Have any chance of a Linux version of Firemin or Firemin exist only because Windows it’s a wrecked system pasted with junk scripts?

  50. Larry Wagner Reply

    Every time you have an update and I attempt to install it, get a message “ShellEx Failedcode 8235 A referral was returned from the server.” Same message, no matter what computer I attemtp to install it on. Have complained in past. No response from you. Sad.

  51. Guido76 Reply

    The link for the portable version is broken.
    We arrive on the download page but .zip don’t download.
    Link for the .exe run well.

  52. Alex2018 Reply

    Hello, and verified that Firemin also works with games. How much RAM is advisable to reduce?

  53. John Reply

    hi, please fix portable download link because when i click it, it just redirect back to download page & not downloading the portable version, thanks

  54. Hate computers Reply


    I get warning from windows defender so I skip this.
    I know it might still be ok but I dont want to take any chances.

    Seemed like a great solution to a problem that just shouldnt even exist in the first place.
    Is there browsers that handles memory better than firsfox ??

    I am getting tired of firefox with ALL the problems it comes with, like the plugin container in the past…maybe it is still part of the problem. Firefox devs seems to be morons.

    • Marcos Jacoby Reply

      Windows Defender warns you of Microsoft spying you while you use Windows?
      Certainly Firefox have it’s faults but I prefer a company that respect my privacy that another that spy me in every way it’s possible.
      And for what I have learned with experience, in fact the problem of leakage occurs in WMM (Windows Memory Management). Firefox don’t have this faults on Linux or MacOS.

  55. Dmitry Reply

    It seems to work awesome for Firefox, thank you! Quick question: does the MemBoost work the same way but for all apps? So do I need to run them both or MemBoost will work for everything including Firefox?

    • Derick Payne Post authorReply

      You do not need to run them both, but I have found that running Firemin with Memory Booster yield better results.

      • Dmitry Reply

        Thank you, Derick, will try two apps at the same time =) With Memory Booster Chrome is also not consuming too much memory now. My ultrabook finally works as it should. You are just awesome, thank you! Hope you’ve got my donation already =) Thanks again, you are awesome!

  56. Frode Reply

    Realy nice progam. Reduced Firefox from about 1,5Gb to 50 Mb of memory usage.
    It worked on Chrome too.

    Got one question.
    Is it possible to run two Firemin at the same time on for Firefox and one for Chrome?
    or the possiblility to monito two browsers at the same time?

    • Derick Payne Post authorReply

      Although Firemin is not able to monitor both browsers, you can select your main browser and then enter the other one’s process into Extended Processes. For example; select Firefox.exe as the main browser and then enter Chrome.exe in Extended Processes.

  57. El_trabuco Reply

    Agradezco esta utilidad, Firemin, porque muchos de los procesos que se ejecutan en memoria pueden ser reducidos con este sencillo programa.

  58. Steve Reply

    I too have the same issue as anonymous, when Windows 7 Home SP1 gets to the desktop the Firemin settings screen is launched automatically. I have several computers and I have halted installation for this. It does not affect my Windows 10 machines, they are fine. Windows 8.1 I have not tried. My Windows 7 machines I only installed on one when I noticed the issue and halted till I can find out why this is happening on 4935, Reverting back for now.

  59. Peter Reply

    Assume I use 32bit Firefox on 64bit Win7: Do I have to install 32bit or 64bit Firemin?

    Does Firemin work for ALL Firefox versions (even for older v52.* Firefox ESR) ?

  60. anonymous Reply

    I have noted in he current build that when I start my PC Firemin starts up with a statup screen instead of just being minimized in the Taskbar. If I click on the Firemin application page it then minimizes to the tray advising via a popup message that it is minimised but still working.

    Is there anyway to get the app to start with windows but not show the main screen on startup and just self minimize to the tray.

    Len C

  61. Michael Reply

    Access denied when trying to download the latest version. Why do you have to zip the installer, why can’t you just offer the executable for download like others do..?!

  62. Santa Reply

    Love your software! But… when trying to install the latest update (4890) I get the following error: (screenshot of error message)

    I had the installer set to “automatically close apps”

    • Rizonesoft Post authorReply

      I could not reproduce the error. Could you please give me more information: OS? 32 or 64-bit? As much information as you can. The error occurs on menu creation, but after testing it on a Windows 7 and XP installation, I recieved no errors.

      • Santa Reply

        Windows 7 Ultimate 64-bit.

        After I received the error, I reinstalled 4890 overtop again, and received the same error, however, firemin WAS updated to latest version. I tried again just now to reinstall overtop, and did NOT get an error.

        I suspect it was because I rebooted after the first two attempts, so this third attempt had no error message. I think rebooting solved the issue.

        All appears well!

  63. Matt Reply

    Went to upgrade to latest version 4890 of Firemin today and while installing, Avast Anti-Virus flagged it and would not allow me to proceed. Also, why is the file labeled “unknown publisher” after I downloaded it went to install. I still have the prior version operational, but this latest version will not install until it is analyzed and passes muster with Avast labs.

    • Rizonesoft Post authorReply

      All Rizonesoft will show “Unknown Publisher” until we get our hands on another Software Signing Certificate. We are working on it and if all goes according to plan will acquire one at the end of February. Furthermore, please read “Is Rizonesoft Software Safe?” for more about false-positives and a possible solution. Here is the VirusTotal scan: As you can see the detection is a false positive.

      To report a false positive to Avast, do the following:

      Add an exclusion for Firemin in Avast. Use this contact form to submit the file: Make sure you’ve noted that it is “False Positive” or send the file to Pack the file into ZIP archive and lock it with password “virus” (without quotes) and attach it to the e-mail. Write the same password inside mail body, so the Avast analysts will know the password right away without guessing. You can also add web address to that file (or webpage of the file/program) if it’s on the internet. Add your own note on why do you think that it’s a false positive. If it was really a false positive, you will get a reply mail after some time.

      In conclusion, thank you for your support!

      • Mike S Reply

        Same problem here, Panda Free Antivirus (Panda Security 2017) v 18.0.00, on w7 ult x64.

  64. Kent Reply

    Hi I tried downloading the latest version of firemin (setup and portable) but apparently your URL links for the latest versions don’t have enough parameters submitted in them (but the previous versions have their own parameters – only the latest versions are problematic). I had to copy the previous firemin version URLs and amended the missing parameters to fit the updated version in order to begin downloading. Other than that, thank you for your continued development.

  65. SankaRea Reply

    On Windows 10, the Windows Defender found the Firemin_X64.exe is Trojan:Win32/Azden.A!cl in

  66. Random Asking Person Reply

    Whats the point of using Firemin if Memory Booster does the same and covers all the processes? Or am I loosing something?

    • Lawrence Reply

      Firefox has it’s own issues that can only be addressed with software such as Firemin and the latest version ( improves memory usage measurably, that is quite noticeably, at least it does for me.

  67. trog7777 Reply

    season’s greetings,

    since firemin build 48xx – if you click on the icon on the task tray, the Extended Processes button does nothing, neither on win 7 or win 8.1, yet if right click the tray icon it does display the extended process panel.
    Also under Win8.1 x64 , Firemin does not auto start with windows.
    If I force the firemin file to the windows startup folder – dumb win8.1 actually copies the firemin executable to that folder and when pc starts – displays ” Fugue.dll is missing “,
    Win8.1 wont let me create a firemin.exe shortcut into the startup folder, yet will let me create a shortcut of the firemin folder into the startup folder, and pops up the folder on computer startup – go figure!. And if I copy the firemin desktop shortcut to the startup folder – windows just ignores the shortcut file…
    [ micro$oft and their annoying pedantic over-security in the recent operating systems – IF it aint a M$ product, you must re-authorize each file every time you run it under Win8.1, even though set to admin privileges – doesn’t matter how many thousand times it has been run before on the same computer – most files windows wants to block when trying to run them – including firemin and firefox etc…. ]

    Win8.1 x64, i3 cpu , AVG antivirus.

    tried FireFox 57 x64 quantum [it unfortunately auto updated],
    Too many glytches , including disabling all addons and bookmark toolbar is broken – have gone back to FF 48 …
    Anyways, FF Quantum update for some dumb reason changed the install folder to be under the “/users/../../firefox ” subfolders [win8.1 i.e. ]… so had to tell firemin where to find quantum FF

    If when you adjust settings, why is there no [OK] button or some such to close the settings panel? Normally a [Cancel] button is there to regress, stop or undo any recent adjustments …
    … or are you supposed to assume the [X] button is to close the settings panel?

    I see there is a new firemin update to build 4839 today, have not yet tried that out.
    … which reminds me – often if the update notify panel has been ignored for a while, and/or the settings panel left in the background, you cannot close either panel without using right click on the tray icon to actually Close firemin – or sometimes need to forcibly close firemin with task manager… then have need to re-start firemin, even on Win7.

    sorry for my comments turning into a novella .

    all the best for 2018

    where the [ Post Comment ] is, there should perhaps be a third option –
    [ ] notify me via email, only on reply to my comments post.

  68. Anonymous Reply

    Hi. I’ve installed Firemin_4838_Setup.exe and upon starting Firemin, build version reads:
    “4837 : 64-bit” and prompts me to download the update again. Any ideas? I’m using Windows 7 Enterprise SP1 x64. Thank you.

  69. Daniel Reply is only 32-Bit! 64 bit has not been updated, is still version!

  70. Tof_28 Reply

    The setup files are corrupted. Please obtain a new copy of the programm. I am under Windows 10 64 b

  71. Gary Mander Reply

    It would be nice if Firemin displayed “Reduce Firefox memory” in the taskbar instead of displaying “Firemin_Xxx.exe”.

  72. Sono Reply

    While Firemin 4825 is running on Windows 7 Pro(64bit), the Esc key will not work.

    • Jacks Reply

      i can also confirm what Sono said While Firemin 4825 is running on Windows 7 Ultimate X64 the Esc key will not work at all hope that’s fixed soon i really like your work

  73. David L MO Reply

    I had been beating my head on the wall. I use Firefox – often with lots of Tabs. Memory use creeps up and Up and UP. 200 — 400 heck, I hit nearly 1 GB and this is running on an old XP with 2 GB. And I discovered this.

    Found this and IT WORKS Very Well.

    And I am running the latest Firefox and it still LEAKS.

    Now with 11 Tabs open and Tunderbird as well (another leaker), Firefox shows 70 MB in Task Manager.

    Thank you. It Works.

  74. Lawrence Reply

    Absolutely CRAZY! My memory has gone from 2GB to under 100MB. Brilliant!! I know it’s a big ask but I would like to see the CPU usage come down. Apart from that a big THANK YOU!

  75. Javafreak Reply

    Great app!
    Well who guess , firefox written C++ language , that memory leaks will appear.
    firemin very good app, it works superb and it is FREE, EVEN BETTER I SAY!
    Huge thanks, now i have time to save some buck for better hardware which can run some bullshit js stuff…

  76. JL Jones Reply

    Another request / suggestion — one which might be another way to customize the frequency with which Firemin does its thing, as many have requested: add a ENABLE/DISABLE selection toggle to the systray icon context menu. That way one could leave Firemin running all the time and “manually” invoke it periodically when desired. I realize this means coding the functionality into the program and I don’t know if that is easy or not, but in case it is, it would be great. Thanks.

  77. Erica G Reply

    hi! I just downloaded Firemin. However, when I restarted PC, the warning(?) window popped up.
    its said;
    “Required resources missing(title)
    A required resource file (C:\Users\XXX\AppDaa\Local\\Firemin_4615\Fugue.dll) is missing. This file keeps all the pretty icons. Why somebody would not like pretty icons is beyond me? What would you do with all this extra space?”
    I uninstalled, downloaded and installed it again. But this window popped up. How can I fix it? Did I do something wrong?

  78. levant_de Reply

    Nice app but did a way exist to clear the ram only every 15 or 60 minutest?
    the Problem is that i play minecraft and every minute the firefox comes in foreground when i use firemin.

    Thanks a lot.

  79. JL Jones Reply

    I have a feature / functionality request. I’m testing Firemin 4 x64 w/ Firefox 54.0.1 x64 under Windows 7. I would like to be able to add a custom RAM trigger (limit) — say, 600MB. I tried editing the INI file to reflect this but it did not work (or I did it wrong). I prefer if Firemin is not triggered anywhere near as often as the current 99MB and/or 9000 millisecond settings require. If this is possible or can be worked into future releases, that’d be great. THX

    • Rizonesoft Post authorReply

      That isa brilliant idea. I will mostdefiinately add it to future releases.

  80. Edgardo Reply

    Thank you very much, it works perfectly.
    My PC is: Processor Type DualCore Intel Pentium E2140, 1600 MHz (8 x 200)
    System Memory 2048 MB (DDR2-800 DDR2 SDRAM)
    OS Windows XP Proffesional Version 2002, Service Pack 3
    Firefox ESR 52.2.0 (32 bit).
    The memory consumption is low from 500MB to 50Mb … having 3 open firefox mozilla tabs.
    A single Mozilla Firefox window consumes me 15 MB of memory.
    Thank you for existing.
    Greetings and Good Luck
    Muchas Gracias, funciona perfectamente.
    Mi pc es: Tipo de procesador DualCore Intel Pentium E2140, 1600 MHz (8 x 200)
    Memoria del Sistema 2048 MB (DDR2-800 DDR2 SDRAM)
    SO Windows XP Proffesional Version 2002, Service Pack 3
    Firefox ESR 52.2.0 (32 bits).
    El consumo de memoria bajo de 500MB a 50Mb..teniendo 3 pestañas de mozilla firefox abiertas.
    Una sola ventana de Mozilla Firefox me consume de memoria 15 MB.
    Gracias por existir.
    Saludos y Buena Suerte

  81. Ronald Geiken Reply

    Wow!!!! With this app installed and working, the amount of memory that Firefox is using is unbelievably low. Glad I found this app and it will be on my computer from here on out. Before installing this app, I had times when Firefox would not respond and I had to restart it. Memory usage is changeing quite a bit, but it is still probably less than 250 meg while previously I had times when it got to 1.5 Gig and that is where it loses control and nothing further can be done to it except restart it.

  82. Arno VP Reply

    GREAT!!! 😀 Memory optimizing – from 800mb to max 250mb and work it.

  83. YCRYSTYAN Reply

    Yo e utilizado la Version: Firemin portable en xp sp3 INTEL COER 2DUO E4600 @ 2.40HZ 4gb ram placa GIGABYTE ME AGRADADO QUE AMENORA EL COMUNISMO DE RAM DE FERIFOX

  84. Mugurel Reply

    Well it works, but for some reason the hard disk usage sky rockets to 100% and it remains that way when firemin is running. So you get rid of one problem and get a new one, not much of a fix.

  85. Ali Reply

    When using Firemin Mozilla it slows down too much and if I use it for a while causes a memory failure and a blue screen.
    I use Windows 7 with 4 GB of ram.

  86. Noel Reply

    I wonder if this is updated to be used with x64 firefox. I have x64 version and when I try to run, it tells me, it can not find firefox in Program Files (x86)

      • ersjunio74 Reply

        Just open Firemin window then Browse or got to folder and select firefox file “C:\Program Files\Mozilla Firefox\firefox.exe”, and don’t forget to Save your settings.

  87. Rose White Reply

    great that has helped a lot 1 last question is there a way to have Firemin going on 2 browsers at one time for example Firefox and Palemoon my daughter and i both play a app on fb I use pale moon she uses Firefox is there a way we can have it on both browsers at the same time

  88. Rose White Reply

    Hello , I would like to thank you for all your hard work 🙂 would also love version for or simple step by step instructions for people who use Pale moon . is there any way you can add a out of the box so to speak for Pale moon users please please as you know its a Mozilla based browser but the setting are just off just enough to not let me sort out how to add this wonderful program to my Pale moon . again much respect for all the hard work you do and ty

  89. Vaughan Reply

    I used this for a little while until I found a solution, then didn’t need it.

    If you set Firefox’s cache limit to 0 Firefox will run so much better. Haven’t needed to use this program since! Sorry! 🙂

  90. anjira95 Reply

    I have used the software and from the Windows Task Manager, if I observe a decrease in RAM usage, but third party applications like hackerprocess I see the typical value of using Firefox RAM for daily use, (400-500 MB ). That sweats, because this difference.

  91. vakul Reply

    I love Firemin. Using it for more than a year now.

    Lately, Firefox gives a “Warning: Unresponsive script” prompt that says “A script on this page may be busy, or it may have stopped responding. You can stop the script now, or you can continue to see if the script will complete.” Only option for me is to restart the machine. Windows 7, 64-bit, 8GB RAM.

    Please try to look into this issue if it needs addressing.

    It’s well worth the donation I made. Keep developing new stuff.

  92. Alistair Connor Reply

    Broken link : “Firemin 4 (Build 4615)” links to “Complete Internet Repair” instead. I had to download the portable version instead (no loss!)

  93. Ed Reply

    I installed the .exe version of *4615 on an Asus K54C laptop running Windows 7 64 with 4 Gigs of RAM today after making a system restore point. Firemin is working fine so far. Firefox memory usage has dropped from about 1 to 1.6 Gigs to about 20 Megs or less. Youtube audio seems fine as I haven’t noticed any popping yet with the default settings. All pages are loading much faster. By default Firemin is set to work with Thunderbird and when I open it with Firemin running, the mail loads instantly for me. Windows memory management has never worked on this laptop, right anyway. Firemin does work. The difference is like night and day. It also places an icon in the system tray where if you run into problems, you can exit easily. Good job and thank you.

    • Rizonesoft Post authorReply

      Im glad its working for you. Let me know if you have any suggestions or when you find something not working as expected. 🙂

  94. Klaus Reply

    Running the portable Firemin 4615 on Win XP SP3: Error executing program. Thanks a lot:(

    • Rizonesoft Post authorReply

      Could you please give me the exact error you see when executing the Firemin executable.

      • Jamie Reply

        I am getting a false positive on build 4615 with Zemana Antilogger. Not sure which other programs think it’s a virus.

  95. Edvards Reply

    Finally a solution that works! Firemin works like a charm! I mean, I have been fighting with enormous memory consumption by Firefox for years and with no real effect! Until now – I found your little tool and it makes such a huge difference! It reduces memory consumption instantly, I can clearly feel this effect on my system (Windows 7 Pro, 64-bit).
    Thank you very much developers!!!

  96. John Reply

    Rizone, sent an email already regarding this issue but wanted to place it on the board as well. In summary there does seem to be an issue regarding audio when using firemin. When streaming media the audio is crackling/popping. I’ve used multiple mozilla browsers, safe modes, extension/add-on troubleshooting, cache clearing, but to no avail. I’d like to suggest providing a more dynamic range of boost intervals and memory reduction limits considering the users able to allocate more memory to it. Allowing a less frequent API call and allowing more memory to the browser would help in eliminating the sound problems. Not sure if this is a bug within the gecko engine, plugin-container, or maybe flash itself, but as the recent comment states, when firemin is closed the audio is flawless across any moz based browser. Thanks again. Hope this helps and look forward to any progress. Mozilla is great, but this tool makes it 100 times better.

  97. Leandro Reply

    Hola, tiene un problema firemin. El problema consiste en que al momento de ver un video de youtube la voz de los videos se entre corta! Use muchos meses firemin pero actualmente tiene esa falla ya lo comprobé 3 veces haciendo uso normal de Firefox Mozilla sin firemin funciona perfecto Podrian arreglar porque antes funcionaba perfecto!!!!!

    • Rizonesoft Post authorReply

      Please type your comments in English. So, you having issues with watching YouTupe Videos while using Firemin. The voice sound is being cut off. Without Firemin it works perfectly.

      I will look into this for you and have a solution soon.

    • Rizonesoft Post authorReply

      It created Mozbase Optimizer for that. Will update Mozbase soon.

  98. Devin Null Reply

    Any plans on making a native x64 version of this app, yes I know x32 runs in x64.

    • Rizonesoft Post authorReply

      Good idea. Will take a look at releasing a x64 version with the next release.

  99. Jamie Reply

    The new build is amazing with the new extended processes! The plugin-container.exe has been the biggest headache with it’s insane memory usage. I have installed scripts to limit flash, etc.. but this destroys any script I have used in the past!

    Well worth a donation and hope others follow along and do the same!

    • Rizonesoft Post authorReply

      Thank you for the comment. Let me know if you have any suggestions. And thank you for the donation. The best reward though is you using and liking Firemin. 🙂

    • Rizonesoft Post authorReply

      5 out of 55 does not a virus make. Anyway, will start reporting this false positive to the respective anti-virus companies.

  100. maxim400 Reply

    Hello again, I tried to make waterfox to firefox, copy all files and rename waterfox and it works fine. Waterfox needs up to 3GB and now about 4MB. I can´t believe!


    • Rizonesoft Post authorReply

      If you downloaded Firemin (Build 3977) Beta. Start Firemin, right-click on the Firemin icon in the tray. Select Profiles.. and then select Waterfox. 🙂

  101. maxim400 Reply

    Is it possible to use Firemin with waterfox, and when, how?
    I tried to change the ini file, but Ithe the programm itselfe changes it back.

  102. Stefan Reply

    Tried Firemin 2086 today. But it looks that it does not decreas private bytes. only the working set is getting lower. See my screenshot:

    FF is still using 1 GB + after a few minutes of usage…

    • Rizonesoft Post authorReply

      Firemin only need to decreas the working set. See explanation below:

      Private Bytes refer to the amount of memory that the process executable has asked for – not necessarily the amount it is actually using. They are “private” because they (usually) exclude memory-mapped files (i.e. shared DLLs). But – here’s the catch – they don’t necessarily exclude memory allocated by those files. There is no way to tell whether a change in private bytes was due to the executable itself, or due to a linked library. Private bytes are also not exclusively physical memory; they can be paged to disk or in the standby page list (i.e. no longer in use, but not paged yet either).

      Working Set refers to the total physical memory (RAM) used by the process. However, unlike private bytes, this also includes memory-mapped files and various other resources, so it’s an even less accurate measurement than the private bytes. This is the same value that gets reported in Task Manager’s “Mem Usage” and has been the source of endless amounts of confusion in recent years. Memory in the Working Set is “physical” in the sense that it can be addressed without a page fault; however, the standby page list is also still physically in memory but not reported in the Working Set, and this is why you might see the “Mem Usage” suddenly drop when you minimize an application.

  103. Thomas Reply

    Doesn’t work

    When trying to launch firefox, it always uses “C:\program files (x86)\…” even though I set a different location.

    When trying to optimize, it hangs at “initializing”, probably as it doesn’t find Firefox’ profile directory (which I have moved out of the %appdata% folder).

  104. Aphotic Reply

    is FireMin still working as intended with the latest versions of FF ?

  105. Neil Parks Reply

    There are a few problems with finagling Firemin with Pale Moon (and possibly some of the others but I don’t have any of those). In particular, the palemoon.ini file (alone of all the listed browsers) contains two copies of the configuration. And I had to edit the last two lines of firemin.ini so that it would find Pale Moon:

    Path=C:\Program Files (x86)\Pale Moon\palemoon.exe

    • Dan Walker Reply

      I need to edit it for palemoon but once edited it wont save… any ideas?

      • Neil Parks Reply

        @Dan Walker: Make sure that Firemin is not in memory before you edit the files. Use Windows Task Manager (ctl-shift-esc) to verify that Firemin is not running.

  106. brian glover Reply

    hello installed both firemin and memory booster as getting lags and occasional freezes on firefox which I use heavily. Configured firemin to start with firefox & 400 setting. Found both firefox and cyberfox startup and web page loading faster and more responsive & more stable experience even with lot of tabs open. Well pleased Thanks

  107. BENETTI robert Reply

    J’ai installé la version buid 2086 puis ensuite la version beta 3997 ?
    J”ai maintenant 2 icônes dans la barre des taches ?
    Comment désinstaller la première version ?
    Ou s’installe Firemin ?

  108. Vinayak Gadkari Reply

    Excellent, the reduction in memory usage is simply amazing! Being a heavy Firefox user, your tool is a blessing for me. Thanks!!!

  109. David Park Reply

    Hope you finish up the new version of Firemin. like to see a 64bit version and have it work with 64bit version of Fire Fox. Thnaks

  110. Aaron Reply

    Wow… this is unbelievable!
    I went from 600K-800K to less than 10K.

    Thank you!!

    Any chance you have something like this for Google Chrome?

    • Jamie Reply

      It opens, it just goes to your system tray. Click the up arrow by your clock to find it. You will see the firemin icon that you can right click and configure.

  111. AnchorGeek Reply

    good program also works with other browsers , I recommend having a link to download cnet or softonic but that does not matter because I got the link on those pages

    • AnchorGeek Reply

      Well not work in all browsers xD , who had not only tried the previous version foxboost

  112. Dwight Shopfeil Reply

    Download limit of 1000 reached. Message of “Download limit exceeded! ” is displayed

  113. David Reply

    Desculpe, em vez de baixar o Firemin esta baixando o Complete Internet Repair, porfavor poderia arrumar o link.

    • rossco Reply

      why do i get pixrepair when downloading firemin ?? is it the same thing ?? if so why is it not called firemin

      • Rizonesoft Post authorReply

        There is a bug in our download system. Please try and clear your Browser session data (cookies/history) and attempt the download again.

  114. jwrnz Reply

    cant download anything, there’s just an excruciating minute long bar that gets to 100% before proceeding to not do anything at all (chrome 44.0.2403.130 64-bit) so now looking elsewhere for rizonesoft software

  115. Sofyan Reply

    Everytime i try to download firemin or memory booster or else it’s always download the same file dvd repair. may u update the link please. thx a lot

    • Rizonesoft Post authorReply

      Sorry for the inconvenience! We implemented a new download system, so some issues can be expected. Everything looks fine on our side and this makes it difficult to troubleshoot the issue you are experiencing. We started a WhatsApp group as a new support option. This will allow us to troubleshoot issues in real time. I suggest you join the group if you experience any further issues. To join, please go to:

    • Rizonesoft Post authorReply

      Sorry for the inconvenience! We implemented a new download system, so some issues can be expected. Everything looks fine on our side and this makes it difficult to troubleshoot the issue you are experiencing. We started a WhatsApp group as a new support option. This will allow us to troubleshoot issues in real time. I suggest you join the group if you experience any further issues. To join, please go to:

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