Firefox: форум сообщества

Since I upgraded from FF128-esr to FF140-esr I always get the "Firefox is being updated by another instance" This is really driving me crazy, as I checked / did / .... everything (and even more) I found on the internet related to that.

Nothing helps !

Creating and using a new default profile didn't help

Finally I ended up uninstalling FF completely (making sure no -zero- leftovers remained in ProgramFiles, AppData a.s.o.), and reinstalled FF140.7.0-esr freshly. After installation I started FF immediately with the created default profile (only existing one) --> SAME THING : "Firefox is being updated by another instance"

And this is really a FF140 thing, when I go back to FF128, on the same computer, same profiles, ...., the problem is gone.

I would like to know in detail what checks are really done by FF to decide to give that "Firefox is being updated by another instance"

Presently 142.0.1 (64-bit) installed; previous updates/downloads had no problems.

Now, however, going to https://www.firefox.com/en-US/?utm_campaign=SET_DEFAULT_BROWSER and attempt a download results in this (image).

Any solution to this?

Thank you.

For past few weeks, Whenever I try to update FFX on windows 11, it fails. It takes me to another screen and tells me to download Firefox. When I try to download it , it aborts with this message.

"download.mozilla.org has a security policy called HTTP Strict Transport Security (HSTS), which means that Firefox can only connect to it securely. You can’t add an exception to visit this site."

To download Firefox with new version I have to use another browser but no choice. Then with new version of Firefox, I have faced the same issue of update and used same approach to update firefox to a newer version.

This error appears for some google sites as well but the same occurring for firefox download site itself is not understood.

Ajay

I am running Firefox 149.0 (64-bit) on Windows 10. FF tells me that there is an update. I downloaded the update, and when I restart FF, it does not update. Version 149.0 is re-started, and Help --> About Firefox again tells me to restart to upgrade. I have tried the upgrade at least three times.

Windows 11 Pro on Lenovo ThinkCentre. I switched to ESR a while back, when the regular and ESR versions coincided. All updates since then have worked fine, until now.

When I allow Firefox to update to 140.3.1esr from 128.14.0esr, then the Firefox browser no longer works at all. It comes up, but entering a URL (by typing or bookmark) does nothing and goes nowhere, so I can't use the internet at all.

I had to use Macrium Reflect to restore my system drive to an earlier time to get back on the internet, using version 128.14.0esr, which lost some recent bookmarks, etc. I have tried this twice, with the same result.

Now, a couple of sites no longer work because they say the browser isn't current.

What can I do about this? I hope I don't have to switch to another browser, because there are Firefox extensions I use all the time. However, I can't use a non-updatable browser indefinitely, because more sites won't work.

Can I fix this?

Thanks for your help, AnneF

Why hasn't firefox 147.0.4 updated to firefox 148 ? The computer is windows 10 home 64 bit that is enrolled in extended security updates. The update has been released a few days ago I believe, in Canada,also I;m wondering if there is a button that is available in "about:config" that forces a update check. Thanks James

Hi there.

The original problem is described here: https://support.mozilla.org/en-US/questions/1472503 ( Also the solution I found.)

Jaws and James seem to have left the building.

This problem first occurred with the update from V 135.0.1 to V 136.0 . Currently on V 136.0.4, and every update has exhibited the same behavior.

I have the same issue with two laptops, running Windows 10. Each has been through a few update cycles, and the "Restart to Update" always fails.

So, I close FF, watch for the Resource Monitor to quiet down, and reopen FF.

When I go through this sequence, I notice that the screen will flash once VERY quickly before opening the home page.

FF seems to function normally otherwise.

Thanks for being there,

greg moehl

Hello, I'm having some problems with updating firefox. It started a few months ago that I got a Pop-up every time I started Firefox about needing to update it. But when I click on the prompt to update it, it leads me to this website: https://www.mozilla.org/de/firefox/new/?reason=manual-update , and after clicking on the download button I get to this site for about a second: https://www.mozilla.org/de/firefox/download/thanks/ after which it loads this site: https://download.mozilla.org/?product=firefox-stub&os=win&lang=de which my browser can't connect to (aka just gives me the standard error message as if you entered an invalid URL). Today I got this website pop-up when starting Firefox: https://www.mozilla.org/de/firefox/welcome/21/ which leads to the same outcome as above. After that I tried to update Firefox by going to the menu -> help -> about Firefox, which searches for updates but then tells me that I have the newest version installed already??? Even when I try to manually install a new version through this site: https://www.mozilla.org/de/firefox/all/ I still get the same result. Please somebody help me out here!

have no idea what this topic falls under but getting the update browser error code 99,999 again after restarting the damn computer when it just froze while I went out for 15mins I am updated so have no clue what to do

wish sending a question or replying to the email was easy but even that is b/s also this deny person claims bug fixed but obviously not

I use Firefox on a ASUS Vivobook running Windows 11. On April 1, it tried to update to version 137.0, but failed and led me into a update loop of sorts. I had to re-install Firefox just to force an update on it, and that worked for a bit. Just today, it decided to update... and led me into ANOTHER update loop, and it's saying that the "install failed" when I check the update history.

Is anybody else experiencing this bug, and is there a way to fix it?

My new Win 11 PC out the box with a Firefox installed on it, worked fine for 2 weeks then an update from you guys causes it to crash, it is stuck in a perpertual reboot loop as windows crash, close then the app restarts despite being told to close, only a reboot will stop it from trying to open and then cause memory leaks.

Also, when are you guys going to incorporate a "Roll back feature" for these situations, so that the older working version can be retrieved.

All my important logins are on firefox and your programmers, whatever they did have jeopardised my ability to access important accounts.

I best check my androind tablet hasn't updates or I will be up the wazoo without a failsafe... Well played Mozilla Devs...

Dear Firefox Support, My issue is with the browser I use 136.0.1 (64-bit). Select Help menu (Restart to update Firefox) I've preformed this task several times so far and I keep getting the something over as I click on Help menu. I restart the browser again however it is the same thing "Restart" again. What is my next step here?

Thank you, Dave 18 March 2025

I wanted to try the new split screen feature. The guide says you need the latest version 149. When I check 'About Firefox' it says I have version 140.9 but it also says 'Firefox up-to-date'. Could you advise how I can update to latest version 149 please?

Hello, I am still running an old WIn 7 media center because I have applications I need that are no longer supported elsewhere. Firefox ESR has been working just fine up until the most recent update - which repeatedly fails to install each time I start Firefox. Is there a location where this update resides? If so may I know this location and procedure to eliminate this errant update? Thanks!

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

My version of Firefox is 108.0.1 -- I am running Windows 10 on a machine that Windows says is not capable of running Windows 11

My installation of Firefox resides on my D: drive. It uses quite a bit of space for cache and other things on my C: drive but it starts and runs on my D: drive.Now I am forced to update, but I can't get the installer to recognize an installation on the D: drive and update it. Instead it makes a new installation on my C: drive and I lose my appearance customizations, history and bookmarks.

I have never believed and cannot accept that an application absolutely MUST reside on the C: drive. It's lazy programming (something I used to do for a living). I can't believe Mozilla programmers wrote an installer that insists that Firefox must live there, so what am I missing? How do I tell the installer to find and update my existing application?

Thanks for your help. I feel as if I am missing something that ought to be obvious.

So I guess my Firefox update to ver. 147 from 146 by its auto update feature, but I realized all the past personal data (ie, history, cookies, passwords, profile, etc) was gone.

I have Mozilla Account (I think it's the same as Firefox Account back in the old days), so my personal data is now retrieved from some device as far as possible, but I lost local personal settings like Shortcuts on the main page on my laptop,p which is the main device to do everything.

I can't help what happened to me, and I will rebuild what I used to be on that day, but I am curious if it's just me, or there is some logic to cause this data loss.

HERE'S HOW I SOLVED THIS "SECURE CONNECTION FAILED" ISSUE:

Kept getting this error when attempting to update Firefox; didn't matter which browser I used; went through the forum postings and tried every this-and-that-and-this-and-that posted there; didn't work; finally --

i opened a $10.00 30-day hotspot account with Xfinity, and the download worked perfectly.

PROBLEM SOLVED.