Firefox Community Forum

Hello,

we are currently experiencing high memory usage issues with Firefox on our terminal servers.

Problem description: All employees work within a terminal server environment. When using web applications such as Vimcar (https://fleet.vimcar.com) in Firefox, we observe a very high RAM consumption. A single Firefox tab can consume 2 GB of RAM or more after being open for several hours. As a result, the terminal server becomes slow or unresponsive, and other users on the same server are affected. Since the terminal server allocates resources on demand, a hanging process continues to request memory until it eventually terminates itself, which severely impacts overall system performance.

Questions: 1. Are there settings or configuration options to reduce Firefox’s memory usage in terminal server environments? 2. Are there recommended best practices for running Firefox with memory-intensive web applications on terminal servers? 3. Is it possible to set memory limits per tab or per user session to improve stability?

Thank you very much for your assistance.

When I have Firefox and a word document open in my mini mac the Firefox application image is suddenly pushing out or sight any word document I also have open at the same time. Conversely, when I relocate the word document and seek to open it again Firefox gets pushed out. What is going on and how do I stop it?

I am not experiencing this problem when I have Safari and a word document simultaneously opened.

fred 10/14/25 at 1:20 pm PST [email removed]@gmail.com

I cloned my 2017 intel iMac onto an M2 Macbook Air. Since one week I use them independently and keep Firefox synchronized. I changed their names in Firefox sync. But under "connected devices" at first there was only one of them, depending on which one I refreshed the open window first. I tried to separate them by logging out and in again, but now both are gone in the list. Nevertheless, syncing works. I hope my Mozilla account won't get garbled up.

Dear Community,

the userChrome.css I used to use to disable the search bar expansion on focus no longer works (http://userchrome.wesleybranton.com/megabar). I disabled all urlbar.search options in about:config. But Firefox still gives me suggestions when I start typing about (as in about:config).

toolkit.legacyUserProfileCustomizations.stylesheets is set to true. The userChrome.css is inside the chrome folder inside the profile directory. I'm on 140.3.1esr (64-bit).

How do I disable this for good?

Thanks in advance!

I have attached a snip of my Firefox GUI.

Glaring white backgrounds in webpage GUIs are, simply, a Pain in the Eyes! I like to get rid of them and I have done for the webpage text background you can see in the image. Now, what I would like to be able to do is to set the same colour as the text background in the URL window and the Bookmarks window.

Is this possible? How is it done?

Thanks

Why am I not able to get sound when watching a video while connected to the internet? If I use Chrome or Edge the sound is fine. Could it be an incorrect setting? Or is this a common problem you are already aware of?

So I had logged into this Firefox account, but while I was, I forgot my password. I needed to enter the correct code from the email, but I lost the recovery key; I needed to enter in the 2FA code from my phone, then I could now change the password. When I logged in, boom, bookmarks gone. Passwords gone, and browsing history gone. I was waiting for it all to sync, but it had probably synced the deletion of everything possibly. I have no idea what happened, but I do not believe my account was compromised, because I did not get any emails about any new logins. If it is encrypted, how can I decrypt it so I can get my stuff back? Thanks.

How do I get back to the 'old' format of Bookmarks with Folders and Sub-Folders. I do not like the newer style of 'most used' along the right column. I prefer to see ALL of my Bookmarks along with any sub-folders contained within. Thank You, Jim Bigger

Today on my (android) phone I received a Firefox update. I have auto update turned off, so I don't know when it was initially available, but I installed updates on all apps late this morning. It reset all of my privacy and search settings. I first noticed because it was giving me google and firefox suggestions as I typed, and I find all autocomplete/suggestions to be annoying and not helpful, so I have always had this turned off as I NEVER want any suggestions. Finding that I checked my other settings, and found that all AI, Firefox Suggest, and usage/diagnostic data were all turned on which were not earlier in the day. I always have this garbage OFF.

After work I checked all of my devices. All of them are set to update automatically but one. That is the only device that did not reset my privacy and search settings, but as soon as it updated it did. (none of my other settings seem to be impacted, as other things I've changed are still there).

Is this going to be standard practice now? I don't even get notifications when it is updated so how will I know to turn this off? Do I just have to check every day? I did a security check just a week ago and all of my settings were off. I do this every few weeks as windows likes to change my settings and install apps I don't need with updates so I regularly check all my apps privacy settings on my phone and PCs.

Is this a known issue? Is this going to be resolved? I don't like when companies collect my data after I have turned it off.

I have Firefox set to reopen the previous session whenever the browser is launched. I normally have multiple windows open; I have different tabs in different windows so as to organize them and make it easier to access a particular tab / type of content. I can mouseover on the toolbar and select a tab via preview.

Until recently, whenever Firefox relaunched my previous session, it kept the arrangement of the windows intact (from right to left in the preview). After a recent update, I assume, Firefox is now no keeps them in the same arrangement; aside from my first window, all the others now randomly (or so it seems to me) rearrange themselves whenever the browser launches.

I can reorder them by selectively closing and reopening windows, but it's getting tedious, and the arrangement only lasts for the current session. Once I shut down and restart my computer the windows are, once again, rearranged to no apparent rhyme or reason.

This is getting really frustrating.

In version 143 there is no rollup window option that allows a linux system to roll the window up out of the way. The icon is a caret located in the top right corner of the window.

При заходе на сайте ya.ru и если на нём имеется строка с видео или поиск с алисой, то начинаются сильные фризы. Это ошибка именно в firefox 142, проверенно.

I can not access my bookmarks links, the bookmarks are there, but the links to the internet is dead. I still have access to my home page, though the bookmarks links are dead. How can I fix this? Thank you for you help in this matter. Gary

hi in a new win 10 instal most text incl Fire Fox text is made up of letters [font] that are made of thin and thick lines [in the same letter]

i dont know if its a strange font or another problem, i have copied all "font" setting from my other pc where i dont have the problem.

also i cant get spell check to work here dsespite turning it on

its very distracting, would be very gratefull for any suggestones if any one can 

help thanks

I have been a long time user of FF and have been puzzled by it's recent failure (to both start, and subsequently re-install) For the last 18 months I have been running Win 12 without problems. That is until last week, when I can only assume the Tuesday udates ( MS) has created havoc. I would appreciate any assistance as I am not fond of MS Edge, or Google Chrome. Dave Hickman.

After many years of untroubled use, I suddenly cannot connect to any Rapidgator address on either of my computers: • Mac Studio M1 64GB Sequoia v15.6, Firefox v143.0.4 and • Macbook Pro i9 16GB Sonoma v14.7.7, Firefox v143.0.4 though I have no problem loading the same links on the same devices using Safari. Interestingly, I have no problem accessing Rapidgator links using Firefox on my phone (iPhone 15 Pro Max, IOS v18.5).

This is a big headache, as most of my material is archived using Rapidgator and my workflow is built around Firefox. I have quit all other apps, rebooted (many times), disabled extensions, turned off Little Snitch, but I keep getting the same results. Any idea what is causing this?

Hello,

I use a Powershell script to manually install a Firefox update.

Starting with version 128.10.xx and higher, Update.exe expects different parameters, but I'm not sure what the parameter names mean (see screenshot).

Can someone explain to me what I need to pass for “arg-version” and “wich-invocation”? All other parameters were already present in the previous version of Update.exe, and I understand those, but unfortunately I don't know exactly what I need to pass for these two.

Thank you very much in advance for any help.