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What the hell is up with Firefox Memory usage?

I love Firefox and have used it forever. But its memory usage is killing me lately and I'm seriously reconsidering.... PC, Win11, Intel7, 16GB memory. (I'm typing this… (閱讀更多)

I love Firefox and have used it forever. But its memory usage is killing me lately and I'm seriously reconsidering.... PC, Win11, Intel7, 16GB memory. (I'm typing this from Chrome)

I've updated, restarted, but it keeps maxing out and slowing my computer to a crawl. Somebody please tell me there's a fix pending?

Open 1 1 129

When playing YouTube videos in Firefox, the video constantly hangs or freezes. I have to restart the browser to continue playback. This happens every time I try to watch videos.

When playing YouTube videos in Firefox, the video constantly hangs or freezes. I have to restart the browser to continue playback. This happens every time I try to watch … (閱讀更多)

When playing YouTube videos in Firefox, the video constantly hangs or freezes. I have to restart the browser to continue playback. This happens every time I try to watch videos on youtube. what is going on?

Open 3 1 168

RAM is disappearing

I always have multiple tabs open in my browser. Previously, I could easily open (and switch between) 20+ tabs (I have 16GB of RAM). Recently, after opening five tabs, the… (閱讀更多)

I always have multiple tabs open in my browser. Previously, I could easily open (and switch between) 20+ tabs (I have 16GB of RAM). Recently, after opening five tabs, the Task Manager shows 10-11GB of RAM (88-90%) in use! How can this be? I cleared the cache and history, but it didn't help. I installed several RAM cleaners, but none freed up the required amount. None of the five programs worked. Where does that 15GB of RAM go when I open Firefox? When will you finally implement something like Google Chrome—they free up RAM for active pages when inactive ones are opened. Maybe it's because I have so many inactive tabs that the RAM is disappearing? But I had just as many tabs before, some of them inactive, and fewer than 20 active ones, so I could easily open another 20. And now I can't even open five new ones. What's happening to the browser?! SOS!

Open 7 1 129

Why is Firefox so slow and freezes up now?

Been using Firefox for over a decade. But lately is has become so slow now. Often freezes up if more than two tabs are open or a website is in any way very complex. What … (閱讀更多)

Been using Firefox for over a decade. But lately is has become so slow now. Often freezes up if more than two tabs are open or a website is in any way very complex. What settings and issues should I check? What has changed? I can run the same sites on Brave and Edge browsers with no issues or not nearly as slow and bogged down.

Open 6 1 70

Firefox Nightly window in window

Hello Im using multiple firefox edition on my PC from beta dev to nightly, and recently in nightly and only nightly I've spotted strange issue that appears as window in w… (閱讀更多)

Hello Im using multiple firefox edition on my PC from beta dev to nightly, and recently in nightly and only nightly I've spotted strange issue that appears as window in window screenshot attached, outer x to close or maximize window does not work only the inner and mostly goes after F11 full screen and then return to normal. Troubleshoot mode and restart does not change or fix this.

Solved 5 1 19

Firefox is running very slow and hanging a lot.

I have been using Firefox forever. It has been running very slow and bugging out especially with you tube on close. I've been working on this for a couple of weeks and a… (閱讀更多)

I have been using Firefox forever. It has been running very slow and bugging out especially with you tube on close. I've been working on this for a couple of weeks and am about to give up. My self built system is about 10 months old. Am using a completely debloated MS 11 pro 25h2. Did not ask for AI from Firefox and have disabled AI in Firefox and copilot is long gone. I have tried everything. Am about to quit firefox. Have refreshed firefox and prevented firefox from running in MS win 11 pro "efficiency mode". I usually have to exit firefox with task manager - there are usually 17 instances of firefox running. Mozilla has become Microsoft.

The system: Gigabyte B650 mobo, 32 gig of DDR5 6000, AMD 7700X processor and an Asrock 9060 graphics card with 16 gig DDR6 Vram. All other apps are running just fine. So I don't think a lack of compute is the problem.

Help please! Thanks in advance!

Open 3 1 20

large amount of RAM

Gentlemen, isn't your browser using a lot of RAM? I've been freaking out about it in recent years. That's only with 25 tabs open!! Despite the fact that the system was in… (閱讀更多)

Gentlemen, isn't your browser using a lot of RAM? I've been freaking out about it in recent years. That's only with 25 tabs open!! Despite the fact that the system was installed just a day ago, without any tweaks!!!

Open 21 1 207

After upgrading to version 152.0, Firefox now grabs up memory and freezes.

Dear Support Person, Yesterday, after being notified that an upgrade was available, I executed the upgrade to version 152.0. The upgrade completed successfully with my ei… (閱讀更多)

Dear Support Person,

Yesterday, after being notified that an upgrade was available, I executed the upgrade to version 152.0.

The upgrade completed successfully with my eight tabs populating on the left side along with a new tab showing all the features of the new upgrade.

I opened my Gmail tab and my Yahoo mail tab. Eventually, Firefox froze up, saying it was Not Responding. I looked at Task Manager and saw that Firefox was continuing to grab up memory. I ended the Firefox process in Task Manager.

I then opened it again and deleted all the tabs except for one. It continued to grab up memory.

I then opened it in Troubleshooting mode. It errored out, and I sent the report to Firefox support.

The only thing that has changed is the fact that I ran the upgrade to Firefox. Nothing else has changed.

Firefox has been my go-to browser for years. I am using Chrome as my access to the internet now, and cringe every time I go into it.

I hope and pray that you can bring my Firefox friend back to me.

I am anxiously looking forward to hearing from you.

Take care and God bless!

~ Kyle P.S. I just tried getting information from about:support. I was able to copy the raw data and then the application crashed. I sent the Crash Report to you folks. The raw data I pasted in the Troubleshooting Information box.

Solved 7 1 137

Firefox consuming all my RAM.

MacOS, M2 2023, fully up to date firefox. Sometimes I'm using firefox and it just stops loading pages, internet is fine. Other browsers work. I look at my activity monito… (閱讀更多)

MacOS, M2 2023, fully up to date firefox.

Sometimes I'm using firefox and it just stops loading pages, internet is fine. Other browsers work. I look at my activity monitor and nearly 100% of my 32GB of ram is being consumed by various firefox processes. A lot of those processes seem to be associated with youtube. This problem usually, but not always, is resolved by restarting firefox. But this shouldn't be happening. I have a lot of tabs open sometimes, but it's not that excessive. And most certainly not 32GB worth and preventing my computer from doing a google search.

If there's a debugging thing I can do to post system logs, let me know and I'll post them next time this happens. I'll be away from my computer until early July, so around that time.

Open 30

Firefox 140 hot fans, slow peformance.

What's wrong with the new release? Today i decided try the new firefox(140) since it's going to be ESR, but i'm getting hot-fan from a couple of tabs (particularly video … (閱讀更多)

What's wrong with the new release?

Today i decided try the new firefox(140) since it's going to be ESR, but i'm getting hot-fan from a couple of tabs (particularly video streams). Second it's slower and seems to have 4second delay for shutdown..

The laptop is running linux mint with intel i5 (11th), tigerlake (iris xe) gpu. It might not be newest, but it shouldn't have a problem with regular web browsing.

Is it a bug? like it's not maxing my ram or cpu during use.

封存 1 139

Restart required to allow stalled page load. What is the quickest method to invoke the restart?

Firefox occasionally stalls during a page load or refresh. A quit/start sequence of Firefox resolves the stall without further action. Is there a key sequence that invok… (閱讀更多)

Firefox occasionally stalls during a page load or refresh. A quit/start sequence of Firefox resolves the stall without further action. Is there a key sequence that invokes a restart: Firefox 140.0.2 (aarch64), MacOS 15.5 (24F74)

封存 1 118

The tabs are stopping loagind after long sessions

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… (閱讀更多)

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

Open 1 99

Skipping when typing is occurring again.

This happened a few years back after a bad update. When I am on forums, Multiple sites) etc, I will be in the middle of typing a sentence and suddenly it scrolls to bott… (閱讀更多)

This happened a few years back after a bad update. When I am on forums, Multiple sites) etc, I will be in the middle of typing a sentence and suddenly it scrolls to bottom of page. 100s of times this has happened. I have waited for a month for a corrective update but will have no choice but to permanently leave firefox if not fixed soon.

Open 3 60

Bug Report for Mozilla Team About Gmail PDF Reader: When you open a Gmail PDF In another window, the zoom setting has a bad response, with much delay, I inform you of this Bug So you can fix it, thank you very much.

Bug Report for Mozilla Team: When you open a Gmail PDF In another window, the zoom setting has a bad response, with much delay, I inform you of this Bug So you can fix it… (閱讀更多)

Bug Report for Mozilla Team: When you open a Gmail PDF In another window, the zoom setting has a bad response, with much delay, I inform you of this Bug So you can fix it, thank you very much.

封存 1 296

Firefox slow on Windows 10 after recent firefox update (2025) 138.0.3 (64 bit)

Using Google Voice became unusable. Firefox too slow. Had been running just fine up till maybe a month ago when I finally gave in and allowed Firefox to update. Not knowi… (閱讀更多)

Using Google Voice became unusable. Firefox too slow. Had been running just fine up till maybe a month ago when I finally gave in and allowed Firefox to update. Not knowing if it was a Windows or other issue I stupidly did a Windows reset and lost all my installed programs (including Firefox). I did a fresh install of Firefox and manually reentered passwords and bookmarks.

Ran fine for a day or two and is now again unusable. Cleared cache and appears to work OK at the moment but still sluggish.

Finn

封存 6 216