Diễn đàn hỗ trợ Firefox

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.

I have taken the position of never installing updates of firefox in windows 10 because of the following: after EVERY update, within 20 minutes of activity my mouse freezes. Keyboard is inactive. I have no option but to reboot. Windows displays "repair mode" 2 HOURS LATER ! the pc finally boots. This happens after EVERY upgrade. Since I have stopped upgrading, the pc behaves.

I had renewed my subscription for MS365 on Tuesday the 30th when I got a popup inviting me to update Firefox to the latest release. I agreed and the download appeared to have worked. However, I soon found I could not access any of the MS365 apps. I restarted and found Firefox had also disappeared. The icons are present in the list of apps but clicking on them gets no response.

I have deleted and reinstalled Firefox and downloaded a new MS365 with no change.

I have Norton online antivirus and the MS365 comes with continuous Defender using Malwarebytes. (I am running down the remaining Norton subscription). I have also used both to do a sweep on each but no problems were found.

I have Outlook which has not been affected.

I am coming to the conclusion that I may need to do a full deletion of both. Can anyone suggest any other way to deal with this?

(Win11Pro) If I allow Firefox to update itself from 123.14.0 ESR to 140.3.0 ESR (now apparently 140.3.1 ESR), the update apparently corrupts something in the browser so that it does not respond to the entry of ANY URL. I have to restore a backup of my C: drive, losing some recent data every time. As it stands, I cannot update Firefox beyond ESR 128.14.0, which is what I'm using now. What should I do? Do I have to switch to another browser? Thank you for your help with this. --AnneF

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

apply patch failed message. version 143.0.1 September 19 2025 update. Yet states "updated" Details saying message apply patch failed is found via firefox browser settings-firefox update history-details. I noticed that on that exact day of the update Audible books will not play as they did previously on the same day prior to update. They play on every other browser but firefox.

Firefox Win7 I had disabled updates, now i want background updates to work. I have disabled all the hacks I did, but no joy. Reinstalled maintenanceservice, still none.

I was installing the latest vwersion and the all of my pages disappeared , plus the is not even an app to get in. Please help ... everything was on Firefox, even my bank account and email.

The Vanguard website warns me that my Firefox browser "is no longer supported" and must be updated. when I try to update, the message is "Firefox is being updated by another instance." what does "another instance" mean? how can I update it? fyi I run Windows 11 on my desktop.

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...

Simply put, I continue to get a message window telling me to update Firefox. I continue to get a response saying I need Windows 10 or later installed. I am running Windows 11 Home on my PC. Multiple attempts to get a reply on this from Mozilla Support. No replies.

After the 8/5/25 Firefox update the internet is inaccessible on my laptop through the standard Firefox browser. The internet is accessible with MS Edge. Toolbar is set to always show bookmarks but none appear. Also, the browser's application's menu does not open to access options such as restore previous session, recently closed tabs, etc. I've restarted my device several times without it resolving the issues with the standard browser.

The Firefox developer version opened in command prompt safe mode (firefox -safe-mode), which is how this inquiry is being sent, but no bookmarks on tool bar or current page history from the standard (non-developer) Firefox.

I'd like to return to accessing the internet using the standard Firefox version with its bookmarks, history, etc. I am using Windows 10. Thank you.

Apologies for the non-descript subject line, but it is accurate: I just attempted a normal update to firefox. The first problem once it relaunched was that it did not show any of my tabs that had been open; it just showed a single "new tab" page. Upon typing any URL, though, the browser does nothing. More specifically, it does not initiate ANY network traffic (according to Little Snitch Mini). I tried various things (redownloading and reinstalling, rebooting, and refreshing firefox), but nothing helped. With the "refresh firefox", the only result is that, after a minute or so, the crash reporter comes up.

Curiously, on the prior update to 140.0.4, I had exactly the same issues. I did manage to resolve it by retrying things the next day and the "refresh firefox" seemed to be the thing that fixed it.

Hardware: Macbook Pro (Apple M3 Max) OS: Sequoia

Downloaded an update of firefox. Is this for real? A message box came up and said I would get a NEW version of firefox but all my things would be saved. Now I have two firefox versions. My old version has all my info and saved and/or chosen settings. HOWEVER the newer version is a new install without settings and WORSE it has GOOGLE as the browser?!?! Is DUCK DUCK GO gone to goOgle? If I wanted a shopping app I would use my GOOGLE account instead of Firefox. How do I fix this?