Diễn đàn hỗ trợ Firefox

I want to upload the current version of Firefox. However, the system Administrator (who is me) will mnot allow me to do so. How do I change settings to allow for the upload.

I use a laptop that's estimated to be around 5 years old now, it still has good performance and rarely shuts down/crashes. The only performance issues it has are with Firefox, as it eats the most CPU and memory of anything else I use. Twice or so now, the following has happened within the past month: - Firefox notifies me that a new version is available and asks to update to it - I decline to do because I have tabs on there with unsaved/algorithmic work I'm in the middle of dealing with, and the browser update would mean losing all of it (or I just don't care) - At some point later, be it a few days or hours later, Firefox suddenly seizes up and forces me to close the application, after which it updates to the newest version.

While it's always frustrating to have this happen, it's generally pretty quick and I can get back to whatever I was doing (as my tabs reload). But today was different. Very different.

So, imagine. You're slacking off, watching some random videos online, and your screen (and eventually audio, too) freeze up. You get Windows to shut it down as it detects the application has gone cold, and it goes and tries to "report the issue", except that little loading screen doesn't seem to come to a stop. "Okay..." So, you click "X", and it goes away after a few tries, but the Firefox icon is still on your taskbar like it's still active. You click it, it doesn't do anything. You click on your other open applications, they also don't do anything. Suddenly, your entire desktop freaks out! You can't ALT+F4 (none of your keys work in fact), the screen is randomly turning black for fractions of a second. Only when you hold down the power button for what feels like a whole minute as a last ditch effort do you get your potato of a computer to go lights out. You press down on the power button again, it boots back up fine. Firefox reopens, and it gives you a little popup about pinning it to your taskbar.

Did Firefox literally crash my computer... to tell me I can use a free (and probably useless) VPN now?... IS THIS WHAT YOU WANTED, YOU LITTLE VULPINE BASTARD??!?!?!

I don't why it's acting like some immature incinerated furry spawn of internet Satan because I simply "decline" to update the browser, but it's really getting on my nerves. I have NEVER HAD an application, let alone a memory-munching browser like this, cause my entire PC to freeze to a severity I have not seen in a long time if ever in the history of using it. What is making it wreak havoc on my computer all for a stupid update that adds garbage I never use? How do I make it stop? Why has it been such an ass with me recently???

I can't let this keep happening, man. It's already caused me to lose some important stuff before, and now apparently it may be able to screw me over on other applications as well. Something could go seriously wrong on my end, and then boom, I move back to Chrome because despite everything, it treated me with more decency when it came to performance. Do better.

On 2026-04-15 from about 10:00 CDT on, I have not been able to update Nightly nor Firefox Developer Edition (Aurora). Both of them notify me that there is an update available, and when I click on Help -> About Firefox I get the usual panel that gives me the update ID to click on. Clicking on it tells me it's Downloading Update -- 0 bytes, and it never flashes the expected size of the update, never shows progress, and never completes. It seems to be acting as if the update server is out of commission.

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.

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?

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"

I've been prompted to update Firefox. Multiple times I have downloaded the latest version, deleted the existing one, and installed the latest one. The next day I get the same prompt that I'm in need of an update.

When I see a message to update, I always do it immediately. A few weeks ago during an update the browser disappeared and wouldn't launch. I had no option but to uninstall with Revo Uninstaller Pro.

When I installed again, I signed in and immediately selected sync and all my bookmarks were recovered but also Chrome bookmarks which I want to keep separately. No complaint, I just deleted all those Chrome bookmarks.

Had to install all my Browser extensions. I have whitelisted a few websites to save cookies from those special websites like online Banking and got an auto popup message "You are using an untrusted browser"

I had to use my phone to get a code from the Bank to continue. I use Biometrics to log into my Bank accounts and also many other websites I have installed on my phone.

Then I got another message and email from the Banks verifying I have a Trusted Browser.

Firefox is my default browser on my phone and my Laptop and always will be. Thanks for allowing me to write this message. I want to confirm this is not a complaint.

cannot update browser. Currently using Linex Mint, #139, but latest is 150. As stated above, when I try to update, says browser update disabled by organization. Do not understand, I never authorized disabling browser updating.

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

I am currently using Windows 11 (64 bit). I have installed Firefox in a separate drive instead of Local C to save space. Now that I have done so, the automatic update fails often which causes me to try and find the custom installation on the Firefox download page. I use https://support.mozilla.org/en-US/kb/custom-installation-firefox-on-windo... page to try to find the correct installer.

Unfortunately, the download page that I was directed to, I can't seem to find the custom installation setup. When I click download, it keeps giving me the automatic Firefox Installer and proceeds to add Firefox on my C drive rather than the Mozilla Firefox Setup Wizard.

Can someone kindly direct me to where I can download the Mozilla Firefox Setup Wizard to update Firefox?

The task name is:

• "Firefox Default Browser Agent 308046B0AF4A39CB"

It runs at 10:07 every day. The command line from task scheduler is:

• C:\Program Files\Mozilla Firefox\default-browser-agent.exe

Command Line Arguments:

• do-task "308046B0AF4A39CB"

It reports that the version of the browser is wrong and that my profile was used with a later version of Firefox. But everything works just fine so how do I fix this error?