Firefox Support Forum

I've tried both version 40 and 42. Every time I try to load a webpage, Firefox quits responding part way through. I've gone through add-ons. I went through all the help articles and nothing worked. The problem started after installing Windows 10 and often happens on Politico and Fox News. I have tried uninstalling and reinstalling. After the uninstall I scanned the registry with ccleaner

When using Firefox and loading multiple tabs, it can be very slow, and even freeze occasionally. Considering the resources I have available, why is this? Are there configurations I can change to allow Firefox to make full use of my processor, RAM and broadband speed?

Also, when I download files etc. from a site, I'm limited to only 4 at a time, and they rarely download faster than 1Mbps, usually only around 200Kbps. Is there a way to increase the number allowed, and to increase the top speed per download?

Thanks.

well on my computer I only work on three four software. so the moment I start laptop I start Firefox and visual studio code, it works well in start but yeah it takes much time to start also. And I have sent the error reporting but i didn't worked out well. I don't know how it work but yeah I was expecting to get a response on my mail but yeah I didn't got any mail. Also I checked on google and tried repairing of corrupted files. It took me around 2 hrs, but still the same eve my Firefox crashed. and when it crashes one time then even if u restart a hundred time. it didn't work well. It only work when I restart the lap. and it just killing my work. and recently its like write 2-3 pages of code or debug and then again Firefox crash then restart and all...

I think my rest software are working well so I didn't asked for windows support. Thanks

It didn't start until the last update. I'm on Mac Snow Leopard and I tried turning off extensions. I have nothing else open, no other software except utility (to confirm its FF sucking the RAM). I have 1 or 2 tabs open. And yet it's sucking over half my RAM! I don't normally need that much and therefore haven't bothered to upgrade. No way I should need to up the RAM JUST for a browser with no extensions on and only 1 or 2 tabs open! What is going on here?

Hi!

In Firefox 38 and later (also tried 43) I examine a really high CPU usage while playing Youtube videos in HTML5 mode. A simple 360p video takes 30-34% CPU in v43, and 56-65% in fullscreen mode.

Firefox 34 works much better here: it consumes 18-25% in both general and fullscreen modes. And even less (just about 8-17% when the video buffering is complete). Firefox 29 works a little worse, but still much better than the new versions.

I have Windows 7 x86 and an nvidia graphics card, so https://support.mozilla.org/en-US/questions/1077259 should not apply especially since older versions work just fine. I should also note that I am using a fairly weak PC for testing this (2GB ram, old Athlon II CPU), yet again older versions never caused any troubles.

I also noticed that in v43 videos from Youtube don't keep buffering until 100% anymore. While completing buffering reduces CPU usage in 34 much, it doesn't seem to have this effect in 38.

Sorry for the confusion. I rarely ever use IE, mostly FF . Lately however my connection on FF seems a bit slow when switching from one favorite to another favorite. The message I get is " FF is running but is not responding " The old FF process must be closed to open a new window."

Am I getting this message because I DONT have the latest FF version on IE ?

I'm a newbie, thanking you in advance for your assistance.

What has happened with Mozilla? A month ago, there were no problems when watching stream video 1080p 60fps. But now it is impossible to do it: constant and long freezes. I have noticed that CPU load is almost 100% when watching stream. I have recorded the system parameters for 10 minutes for the same stream via Mozilla and Edge and the difference is great (see the attached files). I do not know what parameters were a month ago for Mozilla but definitely I never noticed any problems. Hope this info will be helpful to fix the problem.

MacBook Pro early 2011 15" fan starts spinning up when I use Firefox even just one tab/window open slowly as I open a couple more tabs starts spinning more and more. It is unusable. I have done all the resets recommended, extensions removed etc and the problem is the same. I am using Qantam. Thanks

Why Firefox using all of my memory. My PC 8GB RAM. Firefox uses 6GB RAM only for 1 tab? I only read manga at http://www.mangahere.cc/ if the ram is almost full, I have to restart Firefox. Why is RAM management in Firefox so bad? I'm tired of this, please fix it. If you don't believe it, you can test it by reading a random manga.

Why do I restart firefox when ram starts full. Because, if I don't restart, then the other programs that run will lag or hang. In other words, Firefox makes other programs to move to a virtual memory (page file).

I hope I can limit firefox to use RAM (for example 3GB).

Hello all! For the past few weeks, Firefox seems to be a large CPU hog. It uses around 30-50% of the CPU for seemingly no reason. I have ADBlock off (As you can see) There are only two tabs open (I am running Opera as well) I've cleared the cache, I've refreshed the download of Firefox as well. Could someone give me any other suggestions?

By the way, my laptop is a Dell XPS 12 (2014) with an Intel Core i5 4200U and 4GB of RAM Thanks!

A paranoid thought, but I'm looking for some feedback.

I'm aware Firefox is a memory hog and there's some kind of memory leak situation, but it can easily get up to 2.5 G of the "private working set" memory.

I recently noticed Firefox doesn't have a value for its "Image Path Name" in the windows task manager. Coupled with the high memory use, does this look at all suspicious?

The picture attached is a few minutes after Firefox was loaded. I have a session with about 60-70 tabs restored (the tabs themselves do not have the web pages loaded, its just visible in my tab bar with the name oft he site so when I click it, it will load the actual page).

The picture shows the memory at around 500mb - Sure, I have a lot of tabs, but is there really that much memory consumed by those tabs when they are functionally just bookmarks? This was a minute or two after Firefox was restarted.

The part that makes me feel paranoid is the path not showing up in task manager. Makes me think of some kind of trojan-horse type virus running off the process Firefox is identified on (if that makes sense?).

Somehow, with 18gb memory, Firefox can bog my system down after my computer's been running for a day. Am I expecting too much thinking it should stay "quick as a whip" for at least a few days?

Is any of this unusual or something I should look into closer?

I have this problem it is so bad I have to surf with only 1 tab open and I have to wait for upto a minute before typing anything into a box say like a twitter box. And god help me if I accidentally open a second tab My memory use goes thru the roof

I'm trying to troubleshoot some issues on my late 2013 MacBook Pro. Most notably, the performance seems to be absolutely awful with embedded HTML5 videos. For example:

https://twitter.com/CNET/status/897900931861413888

Letting this video play almost immediately pegs my CPU to the point that it actually starts skipping. The same video under Safari and Chrome plays fine and barely taps the CPU at all.

I've tried every version over 54, and this issue is being replicated with a brand new profile and zero extensions installed. It does it even on the latest nightly build as of today (8/19/17).

Any suggestions would be appreciated!

I use Firefox on Windows and Firefox tries to use too much of my system's RAM. I know this is for performance reasons BUT there is very little performance gain. This behavior is fine for users who only run Firefox and little else. BUT I use other memory intensive apps not only Firefox so Firefox using up lots of my RAM is very bad for my use case.

On a system with lots of RAM when I use gmail and Facebook on Firefox the firefox processes can bloat to more than 2.5GB! And it actually seems to start getting slower at that point.

But if I run Firefox in a Windows Virtual Machine with only 1.5GB RAM and start using gmail and Facebook a lot the largest firefox process only gets to a max of 750MB. So that is proof that Firefox can actually work with less RAM without crashing.

How can I get Firefox to behave as if the system has less RAM (e.g. just set a max RAM limit) without to resorting to running it in a VM? I have tried stuff like Process Governor but Firefox tends to crash when it hits the limit instead of running the GC. In contrast on a virtual machine with less RAM Firefox doesn't seem to crash and just uses less RAM.

Is there also a way to get Firefox to automatically do what the about:memory "Minimize memory usage" button does, when it starts to go past a memory usage threshold?

bp-537ecf3d-629b-4985-bb20-b50611171012 bp-2d73b7ae-ba3a-4d27-9c1e-49f2c1171012 bp-7038a1f9-bf4c-46a1-a242-22fbc1171012 bp-3aee7281-bf90-4833-bf8a-bccf11171012 bp-62301d29-5186-4484-bc06-2e11b1171012 bp-22246add-f380-472a-8e17-4dc230171012 bp-b48cad99-1938-4c27-83d1-0e8011171012

Firefox will not start in normal mode nor in safe mode. It crashes instantly to the crash reporter, right after opening.

Everyone I know, and many reporters, here, are having memory leak problems. Hopefully, this will be repeatable, for you: - Run ff, with a single tab, and go to: weather.com, - run Task Manager, and watch cpu head toward 90%, and memory all get consumed.

This is on a Win10 box, clean install, with new install of FF57, and no add-ons. Same issue on Win7 box, which has worked fine, for many years, until 57 came along.

(posted from Win7 box)

I have been using Firefox for more than 10 years now. it is the best browser out there. However, starting from last year I have been noticing that my computer's fan is almost always working which takes too much of my battery and I figured that Firefox is the main issue (I did so many research and tests %100 sure). Later, I herd about the new Firefox quantum, and decided to wait and not switch to another browser. the new one was released and I installed it the very first day. I was super happy that it's much faster and use less memory than other browsers (that's right). However, lately (about a month) I noticed the same the fan is always working again, so I check the task manager and found my dear Firefox quantum acting up again even though 3 taps are opened.

I really need help with this issue to stay using Firefox, I am tired of this issue and really considering switching to another browser because this is just not good at all. and I could not find any way to fix it. please see the attached pic it's just unbelievable.

Good day,

Would someone please help me with a constant crashing of my Firefox Browser 41.01.1? I recently loaded WIN, 7pro 32, which replaced XP. I've reset my browser but seems to be getting worse. I added a few of the most recent reports;

bp-84793de4-19c5-4925-8f59-ea6862151003 10/3/2015 3:01 PM bp-9c1f0f62-486e-4423-96ec-85a312151003 10/3/2015 3:01 PM bp-1032f240-83f7-4899-af36-6a8502151003 10/3/2015 3:00 PM bp-76672b7e-aef5-4435-bfae-3cb9e2151003 10/3/2015 2:58 PM bp-fe734c3b-95d4-47e6-9e5b-419462151003 10/3/2015 2:57 PM

Regards, Vamp

Hi all!

I've been experiencing this problem for quite some time (≈1.5 years) and have finally decided to speak up, since it seems like either the team hasn't solved this bug yet or no one else experiences this.

Every so often, while browsing, pages will stop loading and the error, "Server not found," appears. The trigger seems to be a high-ish amount of RAM use, about 1GB. This happens every couple days if I don't open too many tabs with high RAM use (e.g. YouTube, NYT, etc.) or every couple hours if I'm browsing heavily! Refreshing and/or clearing cache have no effect. Only restarting Firefox (starting RAM use is ≈350 MB) allows me to load pages again—annoying if I fill out a long form, click "Next", and have to start all over again because the next screen doesn't load. This issue frustrates enough that I've finally decided to give Chrome another go (gasp!) and surprisingly, no niggles yet.

I'm on the latest version of Firefox on Windows 7 Pro x64. Hardware: Intel Core i5-2500K, 12GB RAM, 128GB SSD, AMD ATI 5850 Series. Internet connection is perfect at 20Mbps and other browsers run well even when Firefox doesn't. I've tried un- and reinstalling, starting with a new profile (syncing only bookmarks), and even deleting my %appdata% folder to try anew. As you can see, it's quite frustrating and time-consuming!

I'd love to keep Firefox as my primary browser—its customizability and design are the main draws. Any help much appreciated!

Thanks, vinging