Firefox Community Forum

For some weeks I have ad an issue with Firefox using 50%-100% of CPU. Normally it is the Firefox process itself, sometimes it is also "Privileged Cont".

OS is Kubuntu 24.04. Firefox has done this across 2-3 versions.

Things I have tried:

Restarting Firefox No change, I'll even get 100% cpu usage with no tabs open

Refresh Firefox to remove settings and addons No change

Uninstall Snap and try direct Apt package No change

Remove ~/.mozilla to fully remove any residual settings/cache/etc No change

Try with and without hardware acceleration See: https://support.mozilla.org/en-US/questions/1308215 No change!

I would blame my old computer hardware, but Brave runs fine. I am now using Brave, but would dearly like to return to Firefox as I miss containers, and I don't support a chromium dominated web.

Is there a way to just paste a file with path for uploading. In the windows dialogue I can do that to bypass waiting, but in the linux dialogue 1. I really have to wait for all folder content to be shown (I just tried that on a network drive with a quarter million images) 2. I cannot just type paths that are hidden but I know they exist

I updated firefox just yesterday or earlier today idk and the right click menu is so long with multiples of the same and they DO NoThInG! Linux Mint 22 Cin. 6.8.0-55 Generic Kernel

If I display (e.g.) Nepal in Google maps, initially the Nepali names appear beneath the Latin alphabet names, but only for a split second. They are then overwritten with unicode block icons. Some scripts work (e.g. Cyrillic, Chinese, Japanese, Armenian), but most south Asian scripts do this weird "works for a split second" rendering.

I'm running 128.8.0esr (64-bit) on Debian 12.

This problem does NOT occur in Safe Mode!

In Normal mode, I disabled all plugins and extensions, but the rendering still breaks.

Any ideas?

The same page renders properly in Chrome 134.0.6998.88

Snap Firefox 136.0.1 canonical 002 - 1.0 Linux mike22-ThinkCentre-M78 6.8.0-52-generic #53~22.04.1-Ubuntu SMP PREEMPT_DYNAMIC Wed Jan 15 19:18:46 UTC 2 x86_64 x86_64 x86_64 GNU/Linux Having failed to load several time with "Display not found" Echo $DISPLAY  :0 finally loaded with the following errors $ firefox update.go:85: cannot change mount namespace according to change mount (/var/lib/snapd/hostfs/usr/local/share/doc /usr/local/share/doc none bind,ro 0 0): cannot open directory "/usr/local/share": permission denied update.go:85: cannot change mount namespace according to change mount (/var/lib/snapd/hostfs/usr/share/gimp/2.0/help /usr/share/gimp/2.0/help none bind,ro 0 0): cannot write to "/var/lib/snapd/hostfs/usr/share/gimp/2.0/help" because it would affect the host in "/var/lib/snapd" update.go:85: cannot change mount namespace according to change mount (/var/lib/snapd/hostfs/usr/share/sphinx_rtd_theme /usr/share/sphinx_rtd_theme none bind,ro 0 0): cannot write to "/var/lib/snapd/hostfs/usr/share/sphinx_rtd_theme" because it would affect the host in "/var/lib/snapd" update.go:85: cannot change mount namespace according to change mount (/var/lib/snapd/hostfs/usr/share/xubuntu-docs /usr/share/xubuntu-docs none bind,ro 0 0): cannot write to "/var/lib/snapd/hostfs/usr/share/xubuntu-docs" because it would affect the host in "/var/lib/snapd" Gtk-Message: 11:44:12.847: Not loading module "atk-bridge": The functionality is provided by GTK natively. Please try to not load it. [10191, Main Thread] WARNING: GTK+ module /snap/firefox/5917/gnome-platform/usr/lib/gtk-2.0/modules/libcanberra-gtk-module.so cannot be loaded. GTK+ 2.x symbols detected. Using GTK+ 2.x and GTK+ 3 in the same process is not supported.: 'glib warning', file /build/firefox/parts/firefox/build/toolkit/xre/nsSigHandlers.cpp:201

(firefox_firefox:10191): Gtk-WARNING **: 11:44:13.111: GTK+ module /snap/firefox/5917/gnome-platform/usr/lib/gtk-2.0/modules/libcanberra-gtk-module.so cannot be loaded. GTK+ 2.x symbols detected. Using GTK+ 2.x and GTK+ 3 in the same process is not supported. Gtk-Message: 11:44:13.111: Failed to load module "canberra-gtk-module" [10191, Main Thread] WARNING: GTK+ module /snap/firefox/5917/gnome-platform/usr/lib/gtk-2.0/modules/libcanberra-gtk-module.so cannot be loaded. GTK+ 2.x symbols detected. Using GTK+ 2.x and GTK+ 3 in the same process is not supported.: 'glib warning', file /build/firefox/parts/firefox/build/toolkit/xre/nsSigHandlers.cpp:201

(firefox_firefox:10191): Gtk-WARNING **: 11:44:13.115: GTK+ module /snap/firefox/5917/gnome-platform/usr/lib/gtk-2.0/modules/libcanberra-gtk-module.so cannot be loaded. GTK+ 2.x symbols detected. Using GTK+ 2.x and GTK+ 3 in the same process is not supported. Gtk-Message: 11:44:13.115: Failed to load module "canberra-gtk-module"

snap version seems to have problem thought this might help. I am a software developer.

Here are the dpkg/apt logs for update:

2025-03-19 12:33:16 configure firefox:amd64 136.0.2~build1 <none> 2025-03-19 12:33:16 status unpacked firefox:amd64 136.0.2~build1 2025-03-19 12:33:16 status half-configured firefox:amd64 136.0.2~build1 2025-03-19 12:33:16 status installed firefox:amd64 136.0.2~build1

The problem is that when I tried opening gmail in my ubuntu, it is stuck at loading page, but other browsers like edge can open it without any problem (on the same system).

I tried every thing I can in the support forum of gmail/mozilla/others, but it's still stuck at loading.

That's all.

I'm using Linux Mint cinnamon 22 and have the latest version of Firefox installed or updated from the app updates. Firefox was already installed and is my preferred browser. But i have the problem when i go to the settings page i see a message on top (picture attached with this post) that says "Your browser is manged by your organization".

Which is simply not true. This is my personal laptop and it belongs to me. I see an answer from Linux mint devs that they will take it up with Mozilla. But that was three years ago. Can this message be ignored or is it still the case? For peace of mind, how do i verify that something is not managing my device?

older post on this topic : https://support.mozilla.org/bm/questions/1366242 Operating system: Linux Mint 22.1 Cinnamon System: HP Envy 15t k100 personal laptop

I use Firefox with DuckDuckGo on Ubuntu 24.04, Gnome desktop. My Firefox browser window regularly freezes but can be unfrozen by simply repositioning the window. This is really annoying.

I also use Chromium on the same system and there are no issues.

Any ideas?

After updating FF to v. 136.0 in Linux Mint 22.04, I noticed a problem with video playback in Facebook in some posts. A black screen appears with the message "Sorry, there were problems playing this video". The problem also occurs after disabling all plugins and deleting the user.js file from the profile. The problem does not occur after starting firefox in troubleshoot mode, but then hardware acceleration using the GPU does not work (Compositing: WebRender (Software)). I noticed that in version 136 there were some significant changes in the topic of video decoding. https://www.phoronix.com/forums/forum/software/desktop-linux/1524008-firefox-136-beta-finally-enables-hardware-video-decoding-for-amd-gpus-on-linux-by-default I have an NVIDIA GT1030 GPU with 2 MB VRAM.

Christopher

using 64 bit Linux here.

I download an update, but it doesn't do anything. It constantly tells me I need to download an update. Currently using 133.0.3

I managed to get an update through Linux, but now I'm having trouble with Linux. I suspect I need to remove Firefox and reload it. I tried to do that one time but it didn't fix the problem.

Any help would be appreciated.

Jim

I keep seeing a warning that I'd better update firefox by March 14th. But when I try, there seems to be no easy way to do it. I can download the archives, either .bz2 or .xz, for several different versions (ESR or not), for Linux-64. But upon opening these archives, I don't see any obvious "INSTALL" script, nor a "README" or anything else to get me started. How deep do I have to dig into this, to get this simple task done? Why can't it be "one click"? I don't want to go through the hassle of setting up the Debian apt archive to point at Mozilla, since it doesn't seem to be in the defaults -- and why should I have to?

I try to follow the directions in Support, which direct me to the "three lines" menu -> Settings -> General -> Firefox Updates. But it doesn't "automatically download" the new update, in fact it doesn't even seem to try to check for updates, nor is there any link to click to make it update manually. What I see in that panel does not match the screenshot in the Support (see attached image).

I click on "download installer", but it just takes me to the same page where I can specify my language, etc., and then download the archive of the browser itself. No sign of any installer, as mentioned above.

Why is this so hard??? Has my browser been hacked to prevent updates? Please help!

--Benjamin Ketcham-McGrath

I was informed that I need to update Firefox. (Currently running Version 120.0.1 (64-bit) Linux (Fedora). I downloaded firefox-136.0.tar.xz but it is not auto installing. I checked the Settings -> General -> Firefox Updates section, but it is grayed out. I do not have the ability to Check for Updates, or change the auto update options.

How do I install the update?