Firefox Community Forum

Firefox kept eating my RAM, running dozens of processes. I have gone into about:config and set the dom.ipc.processCount to 1 - then I restarted Firefox and found 5 processes running straightaway before even using the browser. I closed it down and have started it again and now there are 11 processes running with just one tab open. Firefox(9044) Utility(7552) JavaScript oracle Network (15912) Data Decoder (11364) GPU (18744) About pages (12536) Preloaded new tab Extensions (20544) Preallocated (16132) Preallocated (13780) Preallocated (16044)

The problem repeats on three different computers which are not infected with malware. One computer with slightly less RAM I now cant even use Firefox at all (though all other browsers work fine) because the tabs constantly crash due to the high number of processes. Is there any way to set the process limit low in a way that Firefox actually responds to?

For some reason, though I have changed absolutely nothing with my browser, now any time a link is supposed to open automatically in a new tab, it opens in an entire new window. My mouse only has two buttons (Magic Mouse on Mac), so there is no way at all for this to be user error in that regard. The best example is in Gmail when you have multiple accounts signed in, you click the profile picture in the upper right and select a different account which then opens in a new tab. I notice that when I use a fresh profile the issue goes away, and migrating a copy of my existing profile between different Firefox versions (this profile I use in 115 ESR exclusively, I don't use it with more than one version, I just mean for testing purposes here), including forks like Waterfox, all are affected by this issue. Is there something in about:config I should look for to change?

I had several pinned tabs set up in Firefox. I switched the Desktop in Windows 11 to use Firefox and to not interfere with my current Desktop Firefox. Afterwards, I discovered my pinned tabs were gone on both desktops.

"Invalid or expired code. Check your authenticator app and try again."

Видається вищезазначена помилка, коли пробую налаштувати двофакторну авторизація за допомогою Google Authenticator або Microsoft Authenticator.

The other day I attempted to use a script in the Greasemonkey extension, which would not work for me. I deleted the extension in the end, but in the process of trying to get it to work, I disabled all other extensions for a time to test what the problem might be.

Ever since then my profile seems to be corrupted in some way. I have refreshed Firefox, as well as made a new profile to test where the error must be. As soon as multi-account containers is reinstalled, the problem returns. This includes the fact that yesterday, for unrelated reasons, I decided to install Linux Mint for my OS and stop using Windows - as soon as I signed in my Firefox account and the profile synced in the new OS, the error returned. (The attempt at refreshing Firefox was done after installing Mint; the test profile was done on Windows.)

This is the behavior I'm seeing:

- I cannot drag a tab that's logged into a different container into a tab group with tabs that are not signed into any container. This includes tabs logged in on the Facebook container. - In fact, I cannot drag any tab that is logged into a container anywhere - they insist on being all the way to the right in the list of tabs. - If a tab logged into a container is all the way to the right in any given window, the button to open a new tab will automatically open the tab in that container instead of opening in no container, which is my preference.

I use the multi-account container extension extensively and would like to see this fixed. If anyone has any idea of what could be happening here I'd appreciate the help!

Hello!

I'm a daily user of firefox and for years I've used the pinned tabs to save my current videos, websites, whatever so I can watch later. Never had any major problems, if I accidentaly closed a firefox window with the pinned tabs while having another firefox window opened, I would just "Restore previously closed window" and get all my stuff back. But now, from yesterday night 2025-08-31 to this morning 2025-09-01, I opened firefox on my PC and my tabs were not there, there was also no option to restore the previous session or window, I simply lost all the stuff I had stored.

I perused the files in the dir `sessionstore-backups` of my profile and they are all from this day, not from the previous day.

Is there any way you guys store those backups from previous sessions when syncing my data to your servers? Can I recover these at all?

Cheers

So the other day I spent hours deleteting old bookmarks (and bookmarks that have for some reason duplicated) from firefox browser, alongside tagging them and other housekeeping things but when I went back into the manage bookmark page all the things I did yesterday had reset so all the bookmarks I had deleted came back all the tags (but one) I made gone. So how do I stop bookmarks resetting to what they were?

After 11 year I suddenly can't access my Wordpress blog on Firefox. I have to use Chrome to access it - with no problems. I have been on Ubuntu Elementary for years years and have never had difficulty accessing my blog. I have uninstalled and re-installed Firefox twice, I have emptied my entire cache and cookies. I also tried to empty my DNS on Ubuntu Elementary but my version doesn't have DNS. The problem started 24 hours ago.

Whhhhyyyyyy am I suddenly unable to access certain parts of the Delta.com website?? I had no problem with the website re my outbound flight and now I can't access any info on my return flight on their "flight details" page. They had to send me a screenshot of what they had on their screen because I cannot get it on my own screen. I am worried as I get closer to my departure date that I still will not be able to access my flight info and will not be able to check-in! They told me to change browsers! Help! 😳

Hi. I have been using Firefox with DuckDuck Go extension for maybe 6 - 7 years now. This worked well with Gmail, no issue. Since July 2025, an update came through in Firefox and now an issue with Gmail. The mail opens properly but after 5 to 20 minutes the responsiveness slows down to stop. A pop up above the mail view states that Firefox is causing the slow down and there is a button to press to stop the issue. When pressed, the mail screen is frozen and I have to exit the G mail and restart. I have uploaded the most recent version of Firefox.

Firefox Ver 143.01.1 64 bit.

Windows 11 Pro

Cannot find the version of G mail used, but it is the latest update.

I have contacted G Mail about this issue as well.

How to resolve the issue, going on since sometime in July? I was hoping that a recent update by Google or Firefox would resolve, but it has not.

Very annoying especially when corresponding or trying to load attachments. Please help.

stickum333@gmail.com