Firefox Community Forum

Was prompted for various system updates including apps(Firefox). Performance has been very sluggish. At some points, it feels like I'm browsing on dialup. I have a 1GB connection from my ISP.

Not sure if this is a Firefox issue or in conjunction with the other system updates.

He said its down to some update which for some reason I dont have but in the attached image, he is able to add his own wallpaper in nightly but I am not for some reason. Would love some support

I have read a number of reports of tab crashing, which I have continually. Running 133.0.3 (64-bit) on Win 11 Home 23H2. Very inconsistent crashes, sometime will open new tabs other times it will crash. I have reinstalled no change. I ran refresh, no change and now when I open Firefox I get a message to restore windows. I can't seem to get that message to go away. Any suggestions, especially about the opening message? I have used FF for years and am almost at the point of switching to Chrome. As an aside, also have problems on some websites processing information/orders when using Firefox. No problem when I switch to Chrome. Thanks in advance......

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.

When I open FF 137 on my iMac running OS 12.7.6, it just keep trying and trying with no link. When I try and quit it needs to be forced quick to stop running. There are no fire walls and it worked yesterday 4-5-25 just fine, but no go today. I tried replacing FF and still no luck, what do I try now, [email removed]@yahoo.com

Firefox has started crashing immediately upon launch. The browser window never even opens, and all I see is the Firefox crash reporter. This problem just started today. Everything was working fine previously.

I have tried opening Firefox in troubleshoot mode, but it still crashes. I've also done two clean reinstalls, deleting all Firefox files in between. This has not helped either.

I've attached a screenshot of the detailed crash report. In case it's relevant, I'm running Windows 11 on a Microsoft Surface laptop with Snapdragon X processor. I know the Snapdragon has had some software compatibility issues, but Firefox had worked fine on it until today. I'm totally stumped, and appreciate any ideas!

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.

When Firefox ver. 143.0.4 (64bit) is opened, I see many tiny groups of black dots withing the whole of the desktop display of this Firefox. From these black dots I see coloured lines traveling across the desktop within the Firefox desktop display. As I move the mouse these coloured lined move, disappear, and move around. Can you offer any suggestions. I am using Ubuntu UALinux Gamepack 22.04, The version of Firefox is an upgrade provided by Firefox updates. I have tried to uninstall this version of Firefox, same effect occuring. I have manually deleted every referance to Firefox, as this worked in UALinux Gamepack 20.04. I have used sudo apt update, sudo apt upgrade, sudo apt --fix-broken install, and sudo dpkg --configure -a. None of these can fix this problem. I restarted my Firefox today with the same problem, and found in the Help dropdown menu, and found troubleshoot mode. When I opened in troubleshoot mode, all these problems are not there any more.

Can you offer any help ??????

P.S. I tryed to take a screenshot of this problem, but the screenshot doesn't show this problem ?

a black box appears over the search box when mouse is moved over the tab. Tried in safe and troubleshoot mode. Box still appears only in white I did find an answer previously but reinstalled firefox and the fix was lost. Problem resolved.

Thanks all for looking.

I restarted Firefox on my Mac earlier, which I think updated it from 136 to 137. After reopening it, web pages won’t load anymore. They either time out or just load indefinitely without doing anything. I went through the troubleshooting page and tried reinstalling it, which didn’t help. My computer’s firewall is off as well. I’ve tried refreshing it multiple times, and I get a message that Firefox has crashed before it actually refreshes. After that, pages will load normally for a very short amount of time (about 30 seconds) before stopping again. Pages are still loading normally on Chrome and Safari, so it’s only Firefox that’s having an issue. Does anyone have any solutions for what this could be/ways to fix it?

Whenever I try to use Firefox, tab keeps crashing and there is a crash report. It keeps happening to the point where I cannot work. Below are some of dozens of crashes I've had this week. I would genuinely appreciate your help.

https://crash-stats.mozilla.org/report/index/b3901d05-40b4-4894-ad6a-a92120241213

https://crash-stats.mozilla.org/report/index/31d91df8-d658-4d25-9704-2140b0241213

https://crash-stats.mozilla.org/report/index/03b80ce3-3873-4ee4-9eee-cea350241213

https://crash-stats.mozilla.org/report/index/f3ecd3ae-a895-4eea-bf98-88b740241213

https://crash-stats.mozilla.org/report/index/f0d2b761-6319-4560-8153-c533c0241213

https://crash-stats.mozilla.org/report/index/d4b9fd34-b6d6-44ca-9ca2-1f88f0241213

I have been using firefox for 3 to 4 years now and it's the best brower i have ever used but from a few months it have gotten too slow i am a student and need to create projects and research alot so i have to open around 20 tabs at a single time but before even after opening 30 tabs it would be fast as ever. I don't have any security extension or whatever i just have AdGuard AdBlocker extention, volume booster and grammerly and screenshot taker and hoxx vpn (it was before as well) but the firfox has become so slow now. (I have custom and max protection on) and additional windows protection too. and sometimes it just stop responding and also hangs up and closes own it own.

I believe this problem began in 133. I've noticed that if FF is open for a few hours, it starts to develop a very noticeable input lag. For example, if I'm watching a YouTube video and hit an arrow key to advance the video, there will be a couple of seconds before the browser registers the key press. It behaves like a high CPU issue but I do not detect high CPU usage when this is happening. Restarting the browser resolves the issue for a few hours.

This is happening on Windows 11 as well as on a Mac running Sonoma.

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

Hi: There is no Refresh Firefox tab. I go to Help More troubleshooting information. Like I've done a million times. And for Diagnose Issues there's only a Troubleshoot Mode and a Clear startup cache tab. No Refresh Firefox tab. I did not want a new profile. I did not want additional profiles. This has messed everything up. Firefox is not working. Thank you

Firefox is using about 15-20% of my CPU, with only one tab open. Running Firefox 141.0.3 (64-bit). I changed performance settings as suggested in support page; made no apparent difference. Ran Malwarebytes and McAfee scans; nothing detected. I have used Firefox for nearly 20 years, but if I cannot resolve this then I will drop Firefox and switch to another browser.

For some weeks I have ad an issue with Firefox using 50%-100% of CPU. Normally it is the Firefox process itself, sometimes it is also "Privileged Cont".

OS is Kubuntu 24.04. Firefox has done this across 2-3 versions.

Things I have tried:

Restarting Firefox No change, I'll even get 100% cpu usage with no tabs open

Refresh Firefox to remove settings and addons No change

Uninstall Snap and try direct Apt package No change

Remove ~/.mozilla to fully remove any residual settings/cache/etc No change

Try with and without hardware acceleration See: https://support.mozilla.org/en-US/questions/1308215 No change!

I would blame my old computer hardware, but Brave runs fine. I am now using Brave, but would dearly like to return to Firefox as I miss containers, and I don't support a chromium dominated web.

Firefox Nightly (next generation web browser test) has no animation delay when playing sprunki, but there is a bug in the beta and current versions that become delay. (That's why I use other browsers.) There is no delay in other browsers. I hope it will be fixed.