Firefox Community Forum

Fox version 150.0 is consuming all available system RAM after the latest update. What's going on? I've been using this browser for years, and this is the first time I've encountered such problems! The tips in optimization guide aren't helping!

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

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?

I have tried for several days to get Firefox to use this GPU; I cannot. Chrome, and Edge use this GPU without issues.

I am using Firefox 151.0 (64-bit) 20260516144017 on Windows 11 Pro 25H2, 26200.8457 Nvidia RTX 2000 Ada Generation Laptop GPU with latest driver: NVIDIA RTX Driver Release R595 U4 (596.36) Tue Apr 28, 2026.

Windows > System > Display > Graphics > Firefox GPU preference: High Performance (NVIDIA RTX 2000 Ada Generation Laptop GPU)

Firefox Settings: General > Performance:

unchecked Use recommended performance settings
 checked    Use hardware acceleration when available

My latest combination of settings are:

gfx.webrender.all = true gfx.webrender.force-disabled = false

webgl.default-low-power = false webgl.disable-wgl = false webgl.disabled = false webgl.enable-prototype-webgl2 = true webgl.force-enabled = true

I have tried several combination of settings to no avail.

I always get: about:support > Graphics > Compositing: WebRender (Software).

Any help is very appreciated -- thank you.

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.

bold text On brand new DELL Alien-ware laptop with Windows 11 Firefox sometimes takes 30 seconds to open, Also once it is closed it cannot immediately open again. Error message shows Firefox is already opened and asks me to close it.

In the task manager under Apps running I see Firefox(12) when only the home page is open. Are those 12 hidden tabs or 12 parallel applications?

Have I made some errors in the Setup?

My problem may not be from the same cause, but I'm experiencing the same issue. Ever since my MacBook M3 Max updated to Tahoe, Firefox has been draining my battery incredibly fast. Before Tahoe, I could count on 8-9 hours of constant work with mixed use of higher processing work. Now, I'm lucky to get 4 hours of light browsing. Before I totally blame Apple, has anyone else experienced a recent shift?

Firefox has recently started crashing multiple times per day. The crashes do not seem to be website specific.

Here is a list of my submitted crash reports. Please help. Report ID Date Submitted bp-4a4b95cb-5de4-4c1a-a039-aa61e0250522 5/22/2025, 4:49 PM View bp-425d3fab-7ee9-4f42-8164-2fb570250522 5/22/2025, 4:49 PM View bp-96f2c479-039b-44a4-af5a-2289b0250522 5/22/2025, 4:49 PM View bp-f1c2ae9d-d9f2-4020-9fac-cc4dc0250522 5/22/2025, 4:49 PM View bp-e7b41459-4e4d-4120-8a9b-5fd140250522 5/22/2025, 4:49 PM View bp-eb018656-c009-449b-a0ec-4b1ad0250522 5/22/2025, 4:49 PM View bp-379d0e69-968d-4466-bb40-110c00250522 5/22/2025, 4:49 PM View bp-4c973572-f639-4093-ac3c-582e90250522 5/22/2025, 4:49 PM View bp-4eaa2ca6-a65c-4b69-9a65-acf030250522 5/22/2025, 4:49 PM View bp-244f6147-2410-45d2-83bb-ad0110250522 5/22/2025, 4:49 PM View bp-e0e22e8c-409a-4dd7-9f38-b35670250522 5/22/2025, 4:49 PM View bp-52f1f46e-c697-4a0e-a946-b46800250522 5/22/2025, 4:49 PM View bp-25042391-231a-4cb7-86ae-7fd570250522 5/22/2025, 4:49 PM View bp-77083bb2-4441-49e7-b621-e13530250522 5/22/2025, 4:49 PM View bp-bf165ce6-fd04-4252-9812-182b60250522 5/22/2025, 4:49 PM View bp-8f18227f-886a-4911-b1e1-05cf30250522 5/22/2025, 4:49 PM View bp-a0f3179b-d107-4c78-a7a1-b5b450250522 5/22/2025, 4:49 PM View bp-82e2715f-60d4-4452-8599-6e7a80250522 5/22/2025, 4:49 PM View bp-cea83fe7-3c58-4cf8-92a6-e665c0250522 5/22/2025, 4:49 PM View bp-0b234002-f59f-4d8d-a531-150af0250522 5/22/2025, 4:49 PM View bp-0dbbce40-5e20-49b6-8320-b97340250522 5/22/2025, 4:49 PM View bp-33f73341-552b-4704-957a-8f7d60250522 5/22/2025, 4:49 PM View bp-7138d2ac-e452-45a0-9c3e-9989d0250522 5/22/2025, 4:49 PM View bp-e4aad04e-743b-4a0e-aa70-1c57d0250522 5/22/2025, 4:49 PM View bp-acc8ec8e-f261-4087-86fb-4e8280250522 5/22/2025, 4:49 PM View bp-ee14e1b1-4e05-4699-a084-4e99f0250522 5/22/2025, 4:49 PM View bp-94a80472-37fa-4f5a-ac91-01ac10250522 5/22/2025, 4:49 PM View bp-75a32236-4cbd-470c-a531-469800250522 5/22/2025, 4:49 PM View bp-9a1633c1-d806-4a15-9ea2-05b310250522 5/22/2025, 4:49 PM View bp-c2c785fe-ea5a-4bac-9c2e-c8d550250522 5/22/2025, 4:49 PM View bp-8617ec7b-e8a6-43e6-aa45-8223c0250522 5/22/2025, 4:49 PM View bp-5ad2eca4-6eeb-4576-b9b7-1c4f10250522 5/22/2025, 4:49 PM View bp-a9a6b606-eaae-4bc0-95e8-88f8c0250522 5/22/2025, 4:49 PM View bp-0a0add6e-5359-4e95-9c53-b99ba0250522 5/22/2025, 4:49 PM View bp-68ff33ff-2576-46e2-a640-033d50250522 5/22/2025, 4:49 PM View bp-e5a72595-818e-4eb8-b6bd-f6fb80250522 5/22/2025, 4:49 PM View bp-fb84105f-be5f-4bc3-8840-89b8b0250522 5/22/2025, 4:49 PM View bp-8296a7d4-6861-45c7-913c-b57a20250522 5/22/2025, 4:49 PM View bp-e88dd1db-9754-4f05-b939-c117f0250522 5/22/2025, 4:49 PM View bp-db96ea58-f258-4555-a7c2-1d9a40250522 5/22/2025, 4:49 PM View bp-8c32df08-4906-48a6-9e13-0799e0250522 5/22/2025, 4:49 PM View bp-69f42d24-29bd-429f-a25b-7e2cf0250522 5/22/2025, 4:49 PM View bp-9f9147b9-5ab5-497d-8179-224b60250522 5/22/2025, 4:49 PM View bp-a2395594-c5a9-4faf-a7c8-4d1ef0250522 5/22/2025, 4:49 PM View bp-73b12d4f-e214-46ee-9b53-fe4390250522 5/22/2025, 4:49 PM View bp-21dbb59d-c084-407c-a40c-fa1c70250522 5/22/2025, 4:49 PM View bp-95e0edb2-60f6-417d-a9bf-db1eb0250522 5/22/2025, 4:49 PM View bp-9865fe2a-33d8-42ac-adab-9819e0250522 5/22/2025, 4:49 PM View bp-e3fe69de-578e-4463-b9b9-43e7a0250522 5/22/2025, 4:49 PM View bp-151af92d-73f7-415d-a400-c26380250522 5/22/2025, 4:49 PM View bp-0f8a7e58-4bf5-4d16-b039-f9d6e0250522 5/22/2025, 4:49 PM View

From the last two Firefox updates, I no longer can move sites screens around on my Mac Air laptop. Only one page at a time shows up and consumes the screen. I am no longer able to copy and past and move info to another screen. A couple of weeks agom I cleared my cache but not sure that had anything to do with it. Please suggest solutions. Is there an add on or something that needs adjusting?

Thank you.

I am running Firefox in Windows 7 on a PC. When I start up Firefox, in WINDOWS Task Manager there appear between 20 and 30 instances of firefox.exe of different sizes in the Processes Window. I can End Process on most of them without shutting down Firefox or any of the other instances of firefox.exe. However if I shut down one listed with about 200,000K of Memory (Private Working Set), then Firefox shuts down and all other instances of Firefox disappear. If I open an new tab in Firefox, more instances of firefox.exe appear.

I have never seen this behavior before. I tried uninstalling and reinstalling Firefox, but the same behavior occurred. Is this normal behavior, or should I be concerned?

I have enclosed screen shots from the Task Manager. I also have a Dump File of a couple of the firefox.exe instances, including the large one, if that would be helpful.

Thank you.

Have been having an issue for the past month or two where if left in the background firefox will slowly start to eat up my available ram. I was using it like this perfectly fine for years previous to now.

I dont have this issue when I'm actively using it, only when I tab away from it and specifically its not on screen. Once I tab back to firefox the ram usage immediately dips back down to normal. I have tried many things to try and solve this like doing a clean install of firefox, getting rid of extensions, clearing my browser cache, closing all other apps to verify it was just firefox, clearing my history, turning on hardware acceleration. Nothing seems to help, im really at a loss and I don't understand what changed besides it being updated in the past couple of months.

My computer is fairly heavy duty and I have 16gb of ddr4 ram that again was working perfectly fine to run firefox before these past couple of months. As a result of this issue however if left in the background for too long on accident firefox uses up all my idle ram and starts causing other programs to not be able to run and has even crashed my computer previously when trying to run a program like clip studio paint.

I have noticed that while running the firefox task manager there is definitely some difference in memory usage when i tab back in after letting it be in the background so I have attached screenshots of the regular usage while tabbed in and the captured usage when i tab back in.

Any possible solution is welcome because I really enjoy using firefox and i dont want to have to switch browsers unless absolutely necessary.

Hi, Please help with my issue: There are 2 Firefox browsers running on my Windows 10 desktop. How can I find one to delete it. My CPU is running very high in Task Manager. Thanks, I just can't find it and I desperately need to do so before my computer crashes! Many thanks any help you can offer is very much appreciated :)

I walked away from my laptop for about an hour and when I came back my task bar was gone. What happened to it? and how do I get it back? Below is the spec's of my lap top that I use/have been using/task bar missing

Do Mozilla really have no idea why their browser is considered a better alternative to other browsers? Why do they insist on making their browser WORSE for the sake of jumping on the latest stupid tech trend!? Some new tech that makes everything it's used in perform considerably worse? Oh boy sounds like the perfect thing for firefox! If this keeps up I'm looking into a browser that's at least more open about the fact it doesn't care.

Of 3 macs in the house, all on OS12, the one on ethernet to the ISP has been failing regularly: 1.) fails to collect history 2.) fails to present long-time home page 3.) if it does boot-up properly, expected behavior slows down markedly during a session on the computer (Usually rebooting the entire machine restores this. This morning even that didn't work.)

FoxFire (v146.0) crash report is available. Here is infor on machine:

 Model Name:	Mac mini

 Model Identifier:	Macmini7,1
 Processor Name:	Dual-Core Intel Core i5
 Processor Speed:	2.6 GHz
 Number of Processors:	1
 Total Number of Cores:	2
 L2 Cache (per Core):	256 KB
 L3 Cache:	3 MB
 Hyper-Threading Technology:	Enabled
 Memory:	8 GB
 System Firmware Version:	483.0.0.0.0
 OS Loader Version:	540.120.3~37
 SMC Version (system):	2.24f32
 Serial Number (system):	C07W4442G1HW
 Hardware UUID:	4FFAC2D9-63A5-5546-973C-5D509C5D43A2
 Provisioning UDID:	4FFAC2D9-63A5-5546-973C-5D509C5D43A2'