Firefox Community Forum

Firefox was running very slowly on my computer. Web pages take a long time to load and sometimes Firefox becomes unresponsive. I have restarted Firefox, but the problem is still happening. Please help me fix this issue.

Looking at the Task Manager in Windows, Firefox is using 2700-3000 MB of Memory when running. I only have 13 tabs at the time of writing this but it is driving my memory up to 50%. (I have 32GB RAM). Is this normal? When I open the Firefox manager, the GPU seems to take like 1-2 GB and i think it is driving up the Memory. I also have UBlock Origin, Privacy Badger and a third extension called Copy Plain Text. This is just concerning me and would like to know if I'm overreacting.

before v151.0.2, didn't have a problem with firefox, now with this new release, it is really really slow, takes some time to start and load pages. what happened??

Has there been a change to the way that crashhelper.exe behaves in recent releases of Firefox?

If I disable all my browser extensions in the current Firefox v154.0.0 (rel. 18-Aug-2026) and restart my Win 10 ESU laptop then the first time I launch Firefox with a single tab open (i.e, my Firefox Home page with search and 4 rows of shortcuts) I typically see ~ 6 instances of firefox.exe in Task Manager that all disappear as expected when Firefox is closed.

However, if I immediately re-open Firefox I typically see ~ 11 instances of firefox.exe plus an additional process called crashhelper.exe (located in C:\Program Files\Mozilla Firefox) load into memory. On occasion the crashreporter.exe process will also briefly appear in Task Manager and then quickly disappear. All these extra Firefox processes unload from memory as expected when I close Firefox, and if I go to about:crashes or (Help | More Troubleshooting Information | Crash Reports for the Last 3 Days | All Crash Reports) it shows "No crash reports have been submitted" in the past 3 days, so my Firefox browser appears to be working correctly even if crashhelper.exe and crashreporter.exe start running in the background.

NOTE: I can reproduce this behaviour if I prevent Malwarebytes Premium from launching at boot-up (i.e., if Settings | General | Windows Startup | Launch Malwarebytes in the Background When Windows is Started is OFF) and restart my computer, so I don't believe that the appearance of crashhelper.exe (or crashreporter.exe) has anything to do with my Malwarebytes real-time protection.

Dell Inspiron 15 5584 * 64-bit Win 10 Pro v22H2 build 19045.7663 * Firefox v154.0.0 * Microsoft Defender v4.18.26070.9-1.1.26070.7 * Malwarebytes Premium v5.6.5.306-163.0.5714 * Macrium Reflect Free v8.0.7783

Wäre es nicht Sinn voller mal Firefox so zu Optimieren das er nicht gleich 50% des Arbeitsspeicher belegt. Ich beobachte schon länger das wenn Firefox eine weile Läuft sehr viel Ram braucht. Da gibts andere Browser wie Brave die viel weniger Ram belegen als Firefox.

Könnt ihr da nicht mal ansetzten und was Optimieren Bei den Ram Preisen Aktuell kauft man sich ja kein neuen RAM.

mfg solo275

Immediately after restart and subsequently starting Firefox 153.0.3 my Windows 11, 16GB system shows that Firefox has started 11 processes, five of which account for most of the 1.2GB of RAM used. Why does Firefox run so many processes, and how can I make it use less RAM?

plz guys help me my eyes hurt so bad because of this

every time i open firefox for pc, a white flash appears very quickly

i tried every thing ai told me to, but still

i cant even record it it doesnt appear in video

Your site has been freezing daily, mostly twice, in last 3 moths or so - on different networks and different devices, causing me to lost relevant data. As your avid user for long time, I am considering to switch in spite of familiarity. Do better for you current and potential new user as I am very much unlike to recommend you and use anymore. Sincerely.

Whenever I have just 1 Window of Firefox and just 1 tab open, task manager ALWAYS shows 14. Why is this? I have refreshed Firefox and lost some of my settings, it did nothing. Have I been hacked and someone else is controlling my browser?

Screenshot shows one firefox with one tab and yet 14 next to it in Task Manager

We have an asp.net Blazor SPA (server side Blazor) that dynamically generates components within the page. Over time, there is a very large RAM leak under document-shared that climbs until the windows are closed.

We have tried various firefox configurations to try and either disable this shared storage as well as limit but with no luck. THe memory allocation is in GB of RAM space and cannot be limited or reduced until the window itself is closed/restarted.

Research online indicates this can happen due to colocated stylesheets and how firefox wants to cache styles aggressively. Adjustments to move stylesheets does not appear to help.

What configurations can I use to help prevent/reduce this high RAM usage? This does not occur in Chrome or Edge, I cannot replicate this well under FireFox for Windows.

So ever since the desktop browser got updated i have been experiencing critical crashes and lag where my pc screen freezes and then goes to black until i restart my graphics card and quit firefox in addition to tabs crashing and very weird performance issues overall, any fixes for this issue?

My Firefox is set to auto-update and did so Wednesday night, so it's currently 152.0.1 (64-bit). Since then, it’s been virtually unusable on my home computer (a 2017 iMac Intel Core i5 running Ventura 13.7.8).

I’ve changed nothing about the way I browse, yet having multiple tabs open at a time makes the application either non-responsive and I have to force quit or makes it crash (from today: bp-3c95c176-fde2-40e4-a61c-c5c080260619 bp-7ebe2fc9-0be2-4db2-b0e3-675df0260619 bp-bfe86698-eaf0-4cd2-96c3-ed20b0260619

It crashed four times yesterday as well, but I inadvertently submitted ALL previously un-submitted crashes, so I'd have to dig through to find ones from June 18th).

I can't get most websites to load. I cleared all my browsing data this afternoon in the hopes that it would help, but now I'm having trouble logging into sites like Facebook, Instagram, etc.

Videos on any platform will not load, let alone play. Instagram, YouTube, Peacock (which I think was having an outage last night), Twitter, BlueSky, etc. YouTube BRIEFLY loaded and played a video last night but there was no audio. I tried searching a word’s pronunciation in Google, no audio. It will not play audio on any music sites (SoundCloud and Bandcamp; they both show that the music is playing, but the indicator bars do not move on either site, and again, no audio).

I believe this is an update issue because work computer (MacBook Air, 2017 running Monterey 12.7.6) is using Firefox 151.0.1 and everything is working as normal there (fortunately I leave Firefox open all the time on that computer so it hasn't auto-updated). It had also been running fine BEFORE the update.

Any ideas on a fix?

День назад установил ваш браузер и он почему-то даже в простое просто грузит ЦП до 40-50% без причины раз в пару минут начинает резко грузить на какое-то время и спадает и так по кругу. В чем проблема? Стоит последняя версия соответственно

Hello Firefox Team

I'm having a problem with Firefox running very slowly, especially when watching YouTube videos. Videos take a long time to load, keep buffering, and sometimes get stuck while playing. The browser also feels slow overall, not just on YouTube. My internet connection seems to be working normally. I have already tried clearing all browsing history, cookies, and cache, but the issue still persists. I'm not sure if the problem is related to Firefox settings, extensions, hardware acceleration, or possibly a hardware issue with my PC.

I'm running Win11, v25H2, os 26200.8524 on a Dell laptop. Firefox v151.0.3 (64-bit) is behaving a bit odd in that I can open a window, open maybe 2 or 3 tabs, close all but one down, and if I check Task Manager it'll show multiple Firefox apps open, sometimes as many as 20+, and the disk usage/storage is usually between 750MB and 1.2GB. I can see if I had multiple windows or tabs open that the number of apps in Task Mgr would be equal, but if I've only got one or two tabs open and Task Mgr shows I've got 23 open? I have gone into Firefox/Settings/Privacy and Security and selected "Never Remember History" so that if I click on History in the main menu bar it never asks me if I want to clear history, but it will show "Recently Closed Tabs" for whatever tabs I may have opened during that Firefox session. But again, if it shows I have 4 recently opened tabs, why would Task Mgr be showing 18 (for example) open instances?

I have not activated Firefox VPN, I have Enhanced Tracking Protection set to "Standard", I do not have A-I turned on, I don't usually use Private Windows, and I don't have any 'extensions' or 'add-ons' installed - I'm using pretty much the 'standard' Firefox installation. I have Norton 360 VPN installed but rarely turn it on. If this makes any difference, I did try out Privacy Badger about 3 months ago for about 2-3 weeks, but it got so odd that I uninstalled it. Interestingly/oddly enough, about half the websites I visit multiple times a week still give me a pop-up message saying "We see that you're using an ad-blocker, would you like to turn it off?" but I can't turn it off if there's nothing installed. To see if I could stop this 'phantom ad-blocker' I even went so far as to "refresh Firefox", but actually I'm getting more instances of websites telling me "turn off ad-blocker so we can make some money out of you!!!" since the refresh.

This is annoying, not life-threatening but since I've had other problems with low disk storage/ high usage, I try to keep an eye on it and Firefox using ~1GB of space doesn't help the situation. I had asked about Privacy Badger a couple weeks ago and the answer was pretty much "if it's uninstalled, it's not working"... so that was pretty much a dead end.

Ideas?