Firefox Community Forum

hi,

  I have an old PC with this CPU:

Architecture: i686

 CPU op-mode(s):         32-bit
 Address sizes:          34 bits physical, 32 bits virtual
 Byte Order:             Little Endian

CPU(s): 1

 On-line CPU(s) list:    0

Vendor ID: AuthenticAMD

 BIOS Vendor ID:         AMD                                             
 Model name:             AMD Sempron(tm) 2400+
   BIOS Model name:      AMD Sempron(tm) 2400+                             CPU @ 1.6GHz
   BIOS CPU family:      29
   CPU family:           6
   Model:                8
   Thread(s) per core:   1
   Core(s) per socket:   1
   Socket(s):            1
   Stepping:             1
   BogoMIPS:             3333.66
   Flags:                fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat p
                         se36 mmx fxsr sse syscall mp mmxext 3dnowext 3dnow cpuid 3dnowprefe
                         tch vmmcall

Caches (sum of all):

 L1d:                    64 KiB (1 instance)
 L1i:                    64 KiB (1 instance)
 L2:                     256 KiB (1 instance)

Vulnerabilities:

 Gather data sampling:   Not affected
 Itlb multihit:          Not affected
 L1tf:                   Not affected
 Mds:                    Not affected
 Meltdown:               Not affected
 Mmio stale data:        Not affected
 Reg file data sampling: Not affected
 Retbleed:               Not affected
 Spec rstack overflow:   Not affected
 Spec store bypass:      Vulnerable
 Spectre v1:             Mitigation; usercopy/swapgs barriers and __user pointer sanitizatio
                         n
 Spectre v2:             Mitigation; Retpolines; STIBP disabled; RSB filling; PBRSB-eIBRS No
                         t affected; BHI Not affected
 Srbds:                  Not affected
 Tsx async abort:        Not affected

in some linux (arch 32 bit) I have problem executing firefox, Is there a version for CPU without request from SSE3 Flag?

thanks

Would like to test nightly builds of Firefox - how best to get started?

I am a user of Ubuntu and interested in testing the Firefox Nightly via snapstore.

Any pointers helpful.

I have been having trouble with my Windows 11 laptop. In my efforts to resolve these issues I noticed that I now have two installs of Firefox in my Control Panel. Both installed during my time of dealing with my Windows issue. Five days apart Feb 5 and 10, 2026. Both show the same version number 147.0.3, and same size 322MB. I have used FF for many years so these seem to have been installed sometime during my efforts to repair Windows. My FF was never a part of the Windows issue AFAIK.

Anyway I have FF working as I like with my Session Manager and various AddOns and personal settings, so I do not want to have to start over with FF. So how do I choose which instance of FF to uninstall in Control Panel?

My issue with Windows was my Outlook would not connect to the server. I assume Microsoft Exchange server, my internet connectivity was fine. And FF was fne as well. I eventually was able to repair my M365 connectivity. Major PITA from out of nowhere.

How do I install a PREVIOUS version of Firefox? I had version 149, and it auto updated on the 7'th. After that update, the problem began. The problem is, something in that update broke google maps as it's used on Realtor.com. It's impossible to drag the map with the mouse, I can zoom in or out with the scroll wheel, but then the area I want to look at is off the screen and I can't drag it back into view.

I downloaded version 149.0 and closed Firefox and tried to install it. BUT it starts, says it's checking space requirements and such, then the installer just stops... because version 149.0.2 is installed. I don't want to uninstall it because that'll wipe out all the settings I have and I'll have to redo every da*** thing from scratch.

I don't have time to wait weeks, months or years for enough people to report this bug and then developers fix the bug and roll out an update for it. I need to fix it now, tonight. And the only way I know to do that is to install the previous WORKING version of it.

Could someone please tell me how to force the installer to install version 149.0 WITHOUT having to uninstall version 149.0.2 and then having to redo every fricking thing...

The developers really should have a ROLLBACK utility in the Settings so that when something in an update breaks the functionality, all a user has to do is click the ROLLBACK button and boom, it reinstalls the previous version without having to jump through hoops to do it.

I do not have this problem in Chrome or any other browser, it's specific to Firefox. I do not like using Chrome or the other browsers I have. I much prefer to use Firefox. Someone please help with this, please!

I noticed when I went to check for updates the Fire Fox Browser is, Windows MSIX Package Mozilla, MSIX 1.0 143.0.1 (64 bit). What is this and why? Do I need to uninstall this version of Fire Fox and reinstall a new one? If so, how do I do that without loosing all my data. Thanks for your help!

Jon Spears

Hello all!

I've started having an issue in the last few days, with apparently two separate Firefox installs. A few days ago I was greeted by a fresh, blank install of Firefox and had to set everything up and sign in as I usually would on a fresh system install. Today, however, I somehow managed to launch both of them at once (I don't know how, as I just use the UI shortcut). After closing both fully, I can now only start the "old" one via the shortcut.

OS: Bluefin / Fedora 42.20, Gnome 48.6

According to the list of flatpaks, only one is installed. Unfortunately that's roughly where my knowledge of Linux ends, so I can't troubleshoot this further. Help will be apprecciated, as I don't want to roll a die on which of these will start up every time I reboot.

Hello Firefox team,

I downloaded firefox-142.0.tar.xz and copied the necessary files to the appropriate directories. Unfortunately, I am missing the 24x24 and 256x256 icons. Could you please add these resources?

I would be very grateful if you could help me with this.

Best regards Chris

When attempting install firefox on linux using the recommended install method (in order to use 1password fully i cannot install it via snap) the priority does not change from 500 to 1000 using the parameters described in the install guide. Here is an image showing my issue.

I have downoloaed Firefox offline installer (a .xz file) from here:

https://download-installer.cdn.mozilla.net/pub/firefox/releases/139.0b9/linux-x86_64/en-GB/

I have also downloaded a .asc file, presumably a pgp signature.

Now both files are saved locally in my computer.

Assuming Linux latest release, how do I verify the contents of the offline installer file (.xz) from the Linux Terminal? I have install gpg tools. And commands like ```gpg``` are available.

What I did so far:

 gpg --show-keys --with-fingerprint firefox-139.0b9.tar.xz.asc

with this output:

 gpg: no valid OpenPGP data found.

Do you really want us to verify the contents of the installers you provide? A sha256 sum would be great, though not as secure, for when the GPG predictably fails for the ordinary user due to its huge and useless complexity and bureaucracy.

Followed unstall and trying to remove remaining folders, data from computer.

I cannot del these folders, etc despite being admin mode or from command line.

whats next.

I want to do a fresh install of Firefox but wont install firefox again if I have to an computer reimage.

I think when Mozilla was formed, it received all the assets of the former Netscape Communications corp, yes?

I tinker with some VMs running vintage OSes, including DOS+Win 3.1, and Linux distro releases from the 90's and early 2000's. I'd like to, for example install Netscape 1.x or 2.x on Win 3.1 and Debian Hamm 2.0.

I am wondering if Mozilla has a download archive somewhere with historic releases like Netscape 1.x through 4.x for all platform for which builds were originally released?

Created Gmail account for gmail.com.

Where my name or initial should appear, it says "Finish setup"

I have checked circles that I want, but it still says "Finish setup."

What can I do?