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Firefox Performing Slowly

In recent months, performance has dropped sharply and I have been unable to resolve using the advice in Help and seeking guidance. I attach the Troubleshooting Informati… (xem thêm)

In recent months, performance has dropped sharply and I have been unable to resolve using the advice in Help and seeking guidance. I attach the Troubleshooting Information, and a screen shot of me attempting access my Amazon account - 15 minutes and counting.

I have tried multiple options including:

  • removal of 25% of software files
  • removal of add-ons
  • Firefox Safe Mode (no improvement)
  • Following performance Troubleshooting guide (e.g. history, caches etc)
  • Third Party software (CCleaner Pro) to check Drivers and Software (all up to date)
  • Check of SSD Status (92% reported by Windows)
  • Task Manager reviews

Seeking your advice and guidance on resolving this (now) painful experience.

Được hỏi bởi Peter S 2 tháng trước

YouTube brings Firefox to a halt; "FirefoxCP Isolated Web Content" using %100 of resources

Ever since the last update or so (I'm currently on 145.0.2), simply opening a YouTube tab is enough to bring my browser to halt. Looking at the activity monitor on my Mac… (xem thêm)

Ever since the last update or so (I'm currently on 145.0.2), simply opening a YouTube tab is enough to bring my browser to halt. Looking at the activity monitor on my Mac shows "FirefoxCP Isolated Web Content" using an insane amount of resources, multiple instances of 101% load on my late 2023 MacBook Pro (M3 chip).

Any ideas?

Được hỏi bởi Airstreamdriver 2 tháng trước

Mac Scaling Issues Moving from Clamshell mode to Built in Retina Display

Hello, for quite some time I have been encountering an issue where the scaling of browser elements gets broken when I unplug my Mac from its dock/external display and the… (xem thêm)

Hello, for quite some time I have been encountering an issue where the scaling of browser elements gets broken when I unplug my Mac from its dock/external display and then being using Firefox using the built in Retina display. This only impacts Firefox and renders Firefox completely useless until I quite Firefox and reopen it. It impacts all open Firefox windows. The attached screenshot explains it better.

Firefox 146.0 (aarch64) MacBook Pro 16-inch, 2023 macOS 15.5 (24F74)

Any ideas?

Được hỏi bởi archer36 2 tháng trước

Lần cuối trả lời bởi archer36 1 tháng trước

Bogged down, slow: Win11 task manager shows more FF browsers than reality

Bogged down, slow: Win11 task manager(TM) shows more FF browsers than reality. Have 11 FF browsers in use but TM says 55 climbing to 77.... numbers vary up & down! … (xem thêm)

Bogged down, slow: Win11 task manager(TM) shows more FF browsers than reality. Have 11 FF browsers in use but TM says 55 climbing to 77.... numbers vary up & down! but never accurate to what is in use. Attempted fixes: cleared cookies, ' Refresh', uninstall/reinstall. Troubleshooting Information: Application Basics said "Profile folder" click "Open Profile' for FF ...but no FF in that list. Tried 'clear Startup cache' and it jumped to 82 after... so worse. How do I get a true number of browsers open and not these 'extras'. Thanks in advance..

Được hỏi bởi pandora888ca 2 tháng trước

please stop adding ai features to firefox

Hi. Not sure how to tag this. I've turned off as many ai features in Firefox as I am able. I'm practically begging for this company not to add more. It slows the browser… (xem thêm)

Hi. Not sure how to tag this. I've turned off as many ai features in Firefox as I am able. I'm practically begging for this company not to add more. It slows the browser, it wastes energy, and to be honest? I don't want summaries of things I'm looking up, I don't want to be recommended apps or features, or chat to a bot, or have my sentences finished for me/help with writing beyond spell check. Google had a decent spelling and grammar checker and then they added gen ai garbage and now it sucks! PLEASE stop adding ai features to Firefox. It makes browsing impossible.

Được hỏi bởi ginazuccaro71 2 tháng trước

Lần cuối trả lời bởi Paul 1 tháng trước

Remove AI features from this browser

Please stop adding AI to your browser. It is making it slower and is a data privacy concern for me as well as many others. If you do not remove them I will be switching b… (xem thêm)

Please stop adding AI to your browser. It is making it slower and is a data privacy concern for me as well as many others. If you do not remove them I will be switching browsers. AI is not only bad for the environment, it does not even do the features you want it to do correctly. Please remove AI from firefox, i have been using this browser for years and would hate to leave because you refuse to remove AI features nobody asked for.

Được hỏi bởi Devin Banister 2 tháng trước

Lần cuối trả lời bởi Paul 1 tháng trước

  • Đã giải quyết

Firefox locks up when browsing eBay

I have been dealing with an issue in Firefox on Windows 11 for several weeks now hoping for a fix soon but it has not come yet. When I am browsing on eBay, it will lock u… (xem thêm)

I have been dealing with an issue in Firefox on Windows 11 for several weeks now hoping for a fix soon but it has not come yet. When I am browsing on eBay, it will lock up and I have to identify the thread in Task Manger and kill it (just the runaway thread, not the entire program). I can then continue of eBay for a short time before it happens again. This only happens on eBay while just browsing, not bidding/buying. Is anyone else having this issue?

Được hỏi bởi firefox3220 2 tháng trước

Được trả lời bởi jonzn4SUSE 2 tháng trước

Firefox ESR 140.6.0 on debian 12.12 locks up the entire system (not crashing) randomly when browing random websites (reddit etc)

So I'm on Firefox ESR 140.6.0 on debian 12.12 but I've noticed this problem with firefox in general (earlier versions) on Linux. When I am browsing with a few tabs open (… (xem thêm)

So I'm on Firefox ESR 140.6.0 on debian 12.12 but I've noticed this problem with firefox in general (earlier versions) on Linux. When I am browsing with a few tabs open (4gb of memory on this laptop) suddenly on reddit or some random website, quite at random, everything freezes and I have to restart the laptop.

Crash reporter doesn't start because the tab doesn't crash instead the entire laptop freezes - it happens only in firefox. How do I debug this problem? I think for some reason firefox gobbles up all my memory perhaps and that causes Linux to lock up.

What do I do about this - it is quite frequent and frustrating but random - I can't say exactly when or on what site this will happen.

Được hỏi bởi vek.m1234 2 tháng trước

clicking isn't working

So out of nowhere, I can't use the back button, or delete pages by clicking the 'x. I can't even click on the settings icon, or any icon on the menu bar. When I hover ove… (xem thêm)

So out of nowhere, I can't use the back button, or delete pages by clicking the 'x. I can't even click on the settings icon, or any icon on the menu bar. When I hover over any web page title, it shows a small window of it, but I can't get rid of it. I didn't change anything, so what's going on?

Được hỏi bởi bluebeamer1 2 tháng trước

Lần cuối trả lời bởi Ed 2 tháng trước

My pc keeps freezing

My computer (pc-windows 10) keeps freezing. Today, when this happened I launched Task Manager and discovered Firefox had opened 68 instances (I had one window open) and … (xem thêm)

My computer (pc-windows 10) keeps freezing. Today, when this happened I launched Task Manager and discovered Firefox had opened 68 instances (I had one window open) and was using up 100% of my Core i7 CPU. I was on YouTube at the time.

I'd like to stay with Firefox as I have been using it for years, but this is happening all too often. Is there a way to limit the number of instances that it will generate?

Được hỏi bởi kcourcey1 2 tháng trước

Dec 2025 Firefox very slow?

The last couple of weeks or so (as of 121025), using Firefox is very slow. Is this another Firefox update issue, or Microsoft update issue, Norton update issue or a combi… (xem thêm)

The last couple of weeks or so (as of 121025), using Firefox is very slow. Is this another Firefox update issue, or Microsoft update issue, Norton update issue or a combination of different updates that aren't working together as has happened many times over the last few years.

Any known solutions to this new problem?

Thanks

Ron

Được hỏi bởi merrittrh 2 tháng trước

Firefox fades "grey" since a feew weeks

HI, sorry my English is not so good -hope, you understand me. Since a few weeks I have a problem with firefox: after using the browser without any problem, I close my Lap… (xem thêm)

HI, sorry my English is not so good -hope, you understand me. Since a few weeks I have a problem with firefox: after using the browser without any problem, I close my Laptop by dialing "Ruhezustand / hibernation". When I open my laptop again (regardless of duration), Firefox tabs are "grey", cannot be longer used. I have to close the browser completely and start again, very cumbersom! What can be the problem? IOS is updated, Firefox also. No other browsers have this problem. Hope you can help me? Best regards

Được hỏi bởi Uli 2 tháng trước

146.0 Firefox Release, 12/9/2025

The minimize, maximize, close line at the top of the screen is missing when Firefox opens. If I click the Firefox icon in the task manager to minimize it and click it aga… (xem thêm)

The minimize, maximize, close line at the top of the screen is missing when Firefox opens. If I click the Firefox icon in the task manager to minimize it and click it again to maximize it, then the missing line at the top appears. This has been an ongoing glitch for a week or more. Perhaps you can fix this minor problem?

Được hỏi bởi M. Fearghail 2 tháng trước

Lần cuối trả lời bởi TyDraniu 2 tháng trước

Firebird freezing

My Firefox for multiple profiles. After opening one and downloading emails it freezes after a minute or two. I have been using Firefox for years, I am using it on a deskt… (xem thêm)

My Firefox for multiple profiles. After opening one and downloading emails it freezes after a minute or two. I have been using Firefox for years, I am using it on a desktop Windows 11 Pro- version 140.60esr. I have donated to Firefox for a number of years. I have gone into the profile and deleted the extension .msf. It did not correct the problem is still freezes. How can I fix the problem. Many thanks.

Được hỏi bởi gvc28 2 tháng trước

Firefox keeps freezing and needs a force quit.

After an hour or two of use, Firefox keeps freezing. I'm on a new macbook pro (sequoia 15.7.2.) I have removed and re-installed newly downloaded versions of firefox three… (xem thêm)

After an hour or two of use, Firefox keeps freezing. I'm on a new macbook pro (sequoia 15.7.2.) I have removed and re-installed newly downloaded versions of firefox three times now: same issue. At the Apple store they can find no fault.

It just froze again so I had to restart it. The activity monitor (see screenshot attached) said Firefox was taking up 26.9GB - it always does this when it freezes.

How can I fix this?

Được hỏi bởi Nick 2 tháng trước

Making Firefox an "AI browser" is a terrible decision

Having heard the news that Firefox's latest CEO wants to turn it into yet another AI-slop browser, I came to this forum to give feedback as an avid Firefox user over the … (xem thêm)

Having heard the news that Firefox's latest CEO wants to turn it into yet another AI-slop browser, I came to this forum to give feedback as an avid Firefox user over the last 4-5 years. I can see I'm not alone either; there are tons of other users who seem to feel the same way I do.

This is a very, VERY bad decision. So far, every "AI update" that has already hit Firefox has done nothing but make the browser worse and more inefficient. A few months ago, Mozilla was getting hit by complaints from desktop users about memory usage skyrocketing due to the implementation of an AI chatbot into Firefox. Now they've added AI search engines among other things. And surprise, surprise--no one seems to actually want to use these features. Why should we, if all it does is make computers run slower, overheat, and doesn't actually answer any useful questions or contribute anything meaningful?

I'm baffled at Mr. Enzor-DeMeo saying he wants to go all-in on making Firefox an "AI browser" with his whole chest in the SAME week that Microsoft has had to lower their growth targets for AI-related sales, some of them up to 50%, because NO ONE seems to actually be buying AI products. You know, on account of (you guessed it) not finding them very useful.

Other people have already mentioned the myriad of other problems with AI too, so I won't touch on those too much, other than to agree that AI is a plagiarism machine that's doing serious environmental damage. What I WILL say is that I personally have been using Firefox all this time specifically because it's avoided the AI craze as much as other browsers, or at the very least, avoided making it "opt-out" instead of "opt-in" to the same degree. But if this changes in the near future and Firefox does become yet another inefficient AI slopfest of a browser, I may seriously rethink my loyalty to Firefox and switch back to Chrome instead. After all, there would be functionally no difference between the two browsers anyway!

Please rethink this decision and consider actually listening to user feedback going forward. If Mozilla actually wants to retain their userbase, I'm sure I'm not the only person thinking about dropping Firefox for Chrome in the future.

Được hỏi bởi oyashirosamanotsukai 2 tháng trước

Lần cuối trả lời bởi Paul 1 tháng trước