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In 2024-25 Microsoft Edge gained the ability to limit the usage of physical RAM that the processes uses. Once that limit is reached tabs are put to sleep or are unloaded. So a user of Microsoft Edge could restrict the memory usage to say 1GB or 2GB or 3GB and so on till the maximum available physical RAM.

Does Firefox have such an ability? Is there some flag or settings in about:config that can be enabled for a similar feature to be used? Does Firefox have ability to put tabs to sleep once SWAP is started to be used? Is there some flag or settings in about:config that can be enabled for a similar feature to be used?

If none of one of the above is not available with Firefox then will Firefox add this feature as part of the browser in the future?

There is a stuttering when i browsing, i do a lot of switching tabs when browsing. The stutter occurs at about every 15 sec, the browser like stopped for half a second, doesn't much but annoying. I cant scrolling, it stopped showing next alphabet when im typing, but still registered what im typing. but when playing videos on youtube the videos is not affected. i do running adblock ublock origin, i tried to switch it off, but it doesnt much affect my laptop performance, and the stuttering still there. i have also have tried doing gfx.webrender.layer-compositor set to true on about:config

As long as my computer doesn't go to sleep Im fine. If it does, when i open firefox, i must refresh to be able to find my bookmarks and passwords. What am I doing wrong? Thanks in advance! Micha

Firefox is not responding. Also various apps are not showing/responding. Apps I use every day have disappeared and when I go into the App Store and search for them they are not even listed.

Hi,

I’ve recently noticed that after a Firefox update, the browser has become very slow and unresponsive whenever I open multiple tabs, around 5–10. Before this update, I could open many tabs without any noticeable lag.

Now, new tabs take a long time to load, scrolling within open tabs feels choppy, and sometimes Firefox freezes for a few seconds before responding again.

I’ve already tried restarting Firefox, disabling extensions one by one, and clearing the cache, but none of these steps have improved the performance. I’m using Windows 10 and the latest version of Firefox.

Could anyone suggest what settings or troubleshooting steps I can try to fix this slowdown?

So either firefox or android (probably firefox) just updated, and it's made a mess of the browser. First of all, the layout of everything has changed - the traffic light menu's at the bottom of th e screen now, completely different, there's a pull bar to see stuff that was previously readily available, the tab icons are longer for some reason but I think they're also skinnier? The hell? It's just generally worse than what it was before. I hate every part of it and want it rolled back on that basis alone, because I actually liked how it worked before, and if I want to change how my phone works I'll do it myself. Stop messing with my stuff, mozilla, I don't come into your house and start moving all your furniture around and putting your cutlery in the wrong drawers, and I'd appreciate it if you returned the courtesy.

But, as annoying - read, infuriating and unnecessary - as that is, that's not the real problem. Oh no. No, that's a personal issue, I'd either learn to live with it or I'd find a modification workaround to get my old UI back. No, the problem is that my previously smooth tab screen - you know, the one where you can see all your tabs open - now lags. Noticeably. How do you mess that up? Seriously, what did you do? It freezes when I'm scrolling up and down! How! How do you do that!

In summary, update bad for UI reasons (please stop moving things for no reason, or at least give us an option to move it back, some of us hate that Really Quite A Lot, to the point where we left chrome over it) but also for previously-nonexistent latency where there absolutely should not be any. I'm on a Fairphone 5, this isn't an ancient brick that barely runs. How do you update something to be actively less functional? Please just roll it back. And if you only take one bit of feedback from me ever, stop touching the UI. It's really annoying. Please. Just don't.

Recently, my Samsung A23 5G started freezing when closing tabs. I only started having this issue since Firefox updated to a new version with a new UI. I am currently on 147.0.3 on both devices. I load one tab, close it, load another, and then it usually freezes on the next close. Clearing the cache often allows me to go a couple more tabs without freezing, while simply closing Firefox still usually has the limit of two tabs before freezing. I usually just press "close app" when the "Firefox isn't responding" system box comes up. I've restarted my Samsung phone but the issue persists. My new Moto G Stylus 2025 doesn't freeze, but Firefox still feels noticably slower, especially when closing tabs.

I've uploaded three screenshots. The first one shows how it freezes while I close a tab, while the second shows how Android's "not responding" message comes up. The third one shows the current version on both of my phones.

I have a two monitor setup. Since I installed the new AMD driver (26.1.1), sometimes when I play a game on my main monitor, and watch stream on Twitch in Firefox on my second monitor, it can cause the PC to freeze completely. I hear the sound, but the image is stuck.

I tried to disable the hardware acceleration in Firefox, and it seemed like a good solution. But because of that (which is its function), sites became laggy.

Is this a Firefox, or an AMD issue? Or Windows (I'm on Windows 11 25H2)? I will try to install an older AMD driver, but honestly streams had became laggy before the driver update for me.

Hi, I’ve been experiencing slow startup times in Firefox, especially when I have my Time calculator web app open. The browser takes longer to load and sometimes becomes unresponsive.

I’ve tried disabling extensions and changing my home page, but the issue persists. Are there any specific settings or troubleshooting steps in Firefox that can help improve performance when using online calculators like this?

Any guidance or tips would be greatly appreciated. Thanks!

When I go to another app, and back, tabs have to reload, often loosing what was done in the page. I have set Firefox as "No restrictions" on my Xiaomi 15 Ultra (HyperOS 3, Android 16), but Firefox still seems to unload memory very frequently.

'I am running fiefox version 147.0.3 in MacOS version 26.2. Every second time I start the program firefox tries to take 15GB of memory. The process does not respond (as this is equivalent to more than the memory available plus the swap space). I have to kill the process and the second time the program has standar memory needs. How can I help developers?

My firefox broswer is starting super slow since the last update. I am on a windows 10 lap top running McAfee anti virus software.

In my task manager there are multiple firefox icons running. See the attached screen shots.

I copied one of the crash report into the note section below.

If any one know show to correct this slow start up pleas let me know.

Thank you Dale

Technical issues After update. I have two computers both of which some problems since the latest Update in February. The microphone won't work on certain apps. One of my extensions are operating as expected and Firefox is not closing all the way or so it's reported. When I go to open up again a new session, it says it's already open but not responding. I have the option close it and then starts right up.

После включения ПК бывает, что я не могу ввести текст в браузере.(как буд-то включается режим только для чтения, что не позволяет текст ввести). горячие клавиши работают, но текст не вводиться только в браузере. Оно само по себе проходит. Как это исправить?

Starting about a week or two ago, I noticed the text of Firefox is grainy. But when the cursor moved, it would get grainy in a different way. So, some letters which were previously unreadable became readable, but other letters became unreadable.

Going to the same web pages with other browsers renders the page readable. So, the problem seems to be Firefox specific.

Even while typing this, portions of the characters on my screen blink in and out.

If there is no solution, I will have to utilize some other browser.

Thank you,

I on MacOS and I'm facing this issue last half of the year. As usual mac book user, I have many WIP items on my laptop, so I don't reload my laptop every day, even months it can leave without reloading.

So, after a workday I just closing it and come back tomorrow. When I back to the work and want to open new tab: Jira, Gmail, LinkedIn any other tabs - FireFox just keeping in loading state. In comparison, the Google Chrome that opened as well all the time but with fewer tabs, open the same links in seconds.

I though the FireFox is not latest version, and updating or re-starting of it, sometimes helped me to fix the issue. But now it seems stopped work either.

So, after a 5 years on FireFox I'm seriously started about my migration back to Google Chrome. I'm not sure that you can help me in this forum, but at least I would like to hear you option. Maybe anyone else have seen such behavior also and FireFox could find the issue

I recently got a new laptop with Windows 11 Pro. I installed Firefox from the Mozilla site. When I click to open Firefox, it takes a long time - 41 seconds to be exact. I uninstalled, reinstalled and restarted my computer. I cleared the cache. I tried to run as administrator. Not sure what else to try. As I wait for it to open, it reads "not responding" in the search bar area. Any ideas?