Firefox Support Forum

Firefox uses too much memory, sometimes 20GB on a 32GB Windows machine. It's usually one or two threads which are hogging incredible amounts of memory. This time I had about 30 tabs open.

Today I tried Firefox about:memory "Minimize Memory Usage" several times, and it was largely ineffective.

I did a "create memory dump file" of one 5+GB bloated thread using task manager, but can't find a way to upload the compressed archive with this report for analysis. Finding a way to report this issue was quite a challenge. It seems most help avenues are now missing/moved, and other reports of this type of issue are "Archived".

I tried killing the 2 bloated Firefox threads and checked for tabs which might be missing or malfunctioning. Everything continued to run normally while more than 10GB of memory was returned to system use. Leaving these bloated threads overnight doesn't improve anything, in fact I can often get up and find my machine is completely out of memory because Firefox consumed it all. My smallest machines have 16GB RAM.

These memory issues aren't new. I've been reporting them off and on for more than a decade. They get better for a few months after reporting, then they get bad again in a few more months. The battle to get memory leaks fixed is continuous while Firefox springs more leaks.

I'd like to give you the memory image I generated so you'll at least have some real data to look at and analyze for this report.

The attached task manager snapshot image is a very minor example of this issue. The numbers keep increasing like there are one or more large memory leaks.

I recently purchased a new Mac Book Pro. After migrating my data from my old one I noticed that when using Firefox my Facebook account was not working properly. I no longer could access my own page or the pages of friends. However, I could access some group accounts I'm associated with. On Safari, everything works fine. I suspect something must have been compromised during the data migration.

I deleted the Firefox app from my new computer and then reinstalled it but to no avail. When I'm in Facebook and try to access my page I get an error message. My OS system to up to date and apparently my Firefox is up to date as well. Any suggestions? Thanks!

I am having a significant issue with firefox draining my battery. I used chrome up until the new year and then switched over to firefox from chrome. Overall I love firefox so much more. The format is way more pleasing. I love how it easily signs me back into everything, BUT IT DRAINS MY COMPUTER SO MUCH. Like i used to have an 8hour + battery span my laptop neverrr died. Now I get through MAX 2 hours of full use before needing to charge, and maybe 4 hours just having it at school but not using it.

I thought my dell suddenly started crashing, ran all these tests, and then I realized the only change was that I had started using Firefox... So sad I think I am going to have to leave it.

I read a lot of articles and did everything suggested. my graphics is webreader , i turned on all the suggested features, i have 2 extensions , the only thing I could maybe think of was that I use an animated theme so maybe that was killing the battery, but like if I can't use my theme than whats the point.

Hi!

I get repeated messages that I use an old version despite having downloaded the most recent version. When i try to start Firefox it won't start, I only get a message and the precise wording of the message is" You've launched an older version of Firefox Using an older version of Firefox can corrupt bookmarks and browsing history already saved to an existing Firefox profile. To protect your information, create a new profile for this installation of Firefox." Then I get two choices, either "Exit" or "Create New Profile". If I choose the first, I exit. If I choose the latter and create a new profile then I loose my bookmarks and browsing history. Appreciate any solution you might have

Like the title says, certain part of UI, including text fields, are displaying the font shown in the screenshot I added. I tried disabling add-ons and updating the app, but neither worked.

The "Layout.css.page-size.enabled" configuration parameter = False ,worked effectively in previous versions, but after updating to Firefox 119.0, it no longer works whether I set it to True or False.

Orientation option is missing when I try to print documents from a website. The Firefox Print Preview window, which usually allows orientation choices for printing, is now not available.

Please advise. Thanks!

When I open browser on my windows 11 PC, I am besieged by notifications from online British newspaper "Metro.CO.UK." I cannot discover a way to stop the notifications. What's up with it?

Hi -- I hope someone can help with this recent problem that has cropped up. Videos that are supposed to be autostart, such as news stories embedded on pages of news sites or video feeding into a side panel on a college sports site I frequent are just continually in buffer mode with the little spin icon in the middle of the screen. This also happens with some, but not all, YouTube videos.

This is a recent development and I didn't do anything to change my setup. I did try updating to make sure I have the most recent version of Firefox, so that's been accounted for. If I close out Firefox and come back to it after a couple of minutes, the problem is cleared, but it only lasts a little while before it begins once again.

Any suggestions? Thanks!

Can't get to Google apps from google home page. Dots for Google apps not there. Only way they appear is to search for something. Otherwise you can't get to apps (no nine dots) or even sign in to google. Nosigh-in box either on first open of browser. Thanks for the help.

I went to a local website and ended up getting virus warnings, see photo. I doubt if it's real but I don't know how to get rid of the messages, or scan for the virus? I scanned with the Windows virus protection and the computer came back clean. I can and have turned the computer off and back on, no help.

Thanks

YouTube is not working in a new tab when I open a link on a new tab from you tube. The Shorts are working fine.

only in Firefox.. other browsers are good... shorts are working fine on new tab but normal videos freeze when open in new tab. besides if i press reload on a running video it also react same. it freeze. please help.

Firefox no longer opens my previous session when re-opening the browser. "Open previous windows and tabs" is checked in the general of browser settings, but no longer performs a such. Was never an issue until a few days ago.

Whenever I try to launch Firefox, a blank window opens and immediately closes instead of the actual browser. This happens no matter how many times I try, even if I restart my computer. In case it's relevant, I'm using Windows 10.

When trying to download something, I have to use "Troubleshoot Mode" Downloads fail to complete when in "Regular" mode. Does anyone have any clue what might be causing the problem?