Все продукты: форум сообщества

I am used to having a Firefox for my personal Mozilla account, bookmarks and sessions, and Firefox Developer Edition to be logged in my work account, where I could use everything I need to work in a separate environment.

Recently I changed a job. Logged out past-job@mail.com from Firefox Developer Edition, logged in with present-job@mail.com and... I still can see old bookmarks.

- I cleared history and new bookmarks: nothing
- went to about:preferences#privacy and clear all the data: bookmarks still there
- tried Help > More troubleshooting information > Refresh Firefox…: all the same
- reinstalled firefox@developer-edition with brew: nah
- eventually, logged out from presetn-job@mail.com in Firefox Developer Edition and personal@mail.com in Firefox; uninstalled both, deleted everything related to "mozilla" and "firefox" was able to find in my system: unsuccessfully

The last thing I didn't try yet is burning my laptop in favor to a new one.

Where are those bookmarks? Why nothing is helping?

I've been struggling for months to standardize a deployment of Firefox ESR across various client environments that reliably auto-updates and doesn't cause UAC prompts and XULRunner profile error pop-ups(I work in IT).

We deploy Firefox ESR in bulk on machines via a batch script which runs as SYSTEM, with msiexec /i and /qn flags.

Firefox installs fine, but then users are typically met with a UAC prompt when they first try to run Firefox. If they decline, then the UAC prompt comes back again next time and often fails to update at all, so the machine is left on an older, vulnerable version.

Regarding the environment: we have deployed the Firefox ESR admx templates and enabled the relevant auto update settings in Group Policy. But only some machines seem to stay up to date, and it seems like this only happens if a user with local administrative privileges has run the program at least once.

What I find unusual is that Firefox seems to attempt to make a "Background Updater" scheduled task for every user that runs the software on each PC, but these users do not have administrative privileges, and the scheduled task is set to only run when that user is logged in. Obviously a scheduled task running as a user with limited privileges isn't going to be able to update files in the Mozilla/Firefox subdirectory in "Program Files" as by default that's read-only access for non-admin users. And, obviously, if a user with local admin privileges DOES log into the machine, then it can update once, but then the scheduled task that it creates for that user (now with admin privileges) will only run when that user logs in - and we don't login as "admin"-privileged users day-to-day.

So, various machines are out of date, running vulnerable Firefox 128 instead of 140 or 142 even though they're all deployed from the same image and have the same policies and restrictions, and ran the same installer for Firefox.

Is there some reason why the auto update scheduled task isn't created at installation time, when administrative privileges have been granted? It's very odd that it doesn't, because then every time a user logs into a machine it seems like Firefox ESR creates the background upgrade task under a non-admin user which simply won't work. I see machines having 4 or 5 background upgrade scheduled tasks, all created by Firefox ESR, and yet the software still won't update - there's a UAC prompt every time the program launches, and going to Help -> About shows "Restart Firefox to update..." but then when clicking the button to restart Firefox, we get the UAC prompt, user doesn't have privileges, so this goes around and around in circles.

Is there a reliable way to keep Firefox up to date without manually logging into each machine and going through the UAC prompts? Can we manually create a scheduled task with the correct user account that has privileges to actually upgrade Firefox?

The background auto update mechanism simply doesn't make sense to our team on a machine-wide install.

Is it possible to make a donation to Mozilla without providing so much personal information? I got a message on Firefox today asking for a donation, but when I tried to do that, I was asked for my home address. It's a general rule of internet marketing that people who use the internet would rather do anything than pay for something, so it's bad psychology to impose unnecessary conditions when you're asking for a donation. I don't have to provide my home address when I make donations to other organisations, so why does Mozilla need my home address? I apologize if this is the wrong place to ask this question, but I can't find anywhere else to ask it!

Thanks,

Shaun.

All of my bookmarks have been disappeared with a new automatic update (9/22) and now I'm left with no bookmarks at all. My other devices were not synced because my work computer needed different links saved. Any easy options for recovery? The bookmark management tool shows no options to import bookmarks and clicking any of the restore or import options does literally nothing. This is a huge issue for work flow and is putting me out of schedule. Why would an update remove ALL bookmarks? Seems like a serious over look in function.

Hi. The "What's New?" page displayed all this: __________________________________________________ Help us improve your firefox.com experience

In addition to Cookies necessary for this site to function, we’d like your permission to set some additional Cookies to better understand your browsing needs and improve your experience. Rest assured — we value your privacy. Cookie settings Firefox home

   Features

Top Features

   Fingerprint Blocking
   Ad Tracker Blocking
   Private Browsing Mode
   Free Password Manager

View all Firefox Features

Resources

   Product
       Desktop
       Mobile
       Release Notes
       Support
       Add-ons
   Learn
       Blog
       Compare
       Podcast

Download

Firefox is no longer supported on Windows 8.1 and below.

Please download Firefox ESR (Extended Support Release) to use Firefox.

Download Firefox ESR 64-bit

Download Firefox ESR 32-bit Download a different build

Firefox is no longer supported on macOS 10.14 and below.

Please download Firefox ESR (Extended Support Release) to use Firefox. Download Firefox ESR Firefox Privacy Notice Download

Firefox is no longer supported on Windows 8.1 and below.

Please download Firefox ESR (Extended Support Release) to use Firefox.

Download Firefox ESR 64-bit

Download Firefox ESR 32-bit Download a different build

Firefox is no longer supported on macOS 10.14 and below.

Please download Firefox ESR (Extended Support Release) to use Firefox. Download Firefox ESR Firefox Privacy Notice Release Notes

   Desktop Desktop Beta & Developer Edition Desktop Nightly Android iOS 

See what’s new in Firefox!

Release Notes tell you what’s new in Firefox. As always, we welcome your feedback. You can also file a bug in Bugzilla or see the system requirements of this release. 143.0.1 Firefox Release

September 19, 2025 Version 143.0.1, first offered to Release channel users on September 19, 2025 Fixed

   Fixed a tab crash experienced by some users caused by DLL injection. (Bug 1872261)

   Reference link to 143.0 release notes.

Get the most recent version

Download Firefox — English (US)

   Windows 64-bit
   Windows 64-bit MSI
   Windows ARM64/AArch64
   Windows 32-bit
   Windows 32-bit MSI
   macOS
   Linux 64-bit
   Linux ARM64/AArch64
   Linux 32-bit
   Android
   iOS

Your system may not meet the requirements for Firefox, but you can try one of these versions:

Download Firefox — English (US)

   Windows 64-bit
   Windows 64-bit MSI
   Windows ARM64/AArch64
   Windows 32-bit
   Windows 32-bit MSI
   macOS
   Linux 64-bit
   Linux ARM64/AArch64
   Linux 32-bit
   Android
   iOS

Firefox is no longer supported on Windows 8.1 and below.

Please download Firefox ESR (Extended Support Release) to use Firefox.

Download Firefox ESR 64-bit

Download Firefox ESR 32-bit Download a different build

Firefox is no longer supported on macOS 10.14 and below.

Please download Firefox ESR (Extended Support Release) to use Firefox. Download Firefox ESR

   Download Firefox
   Download Firefox
   Download Firefox
   Download Firefox
   Download Firefox
   Download Firefox
   Download for Linux 64-bit
   Download Firefox
   Download for Linux 32-bit
   Firefox for Android
   Firefox for iOS

Firefox Privacy Notice All Firefox downloads Need help or want to leave feedback? File a bug Leave feedback Get Involved

Did you know that most of the content in Firefox Support was written by volunteers? Find out more Other Resources Developer Information Complete list of changes for this release Press Kit Mozilla and Firefox News Firefox Extended Support Release All Firefox for Desktop Releases Learn more about Firefox Get the most out of Firefox with how-tos and online security tips.

Get Firefox news Download Download Firefox

   Windows
   Mac
   iOS
   Android
   Linux
   Custom Download Options

Latest Builds

   Nightly
   Beta

Firefox for Business

   Enterprise

Community

   Connect
   Contribute
   Developer

Resources

   Compare
   Release Notes
   Learn
   Support
   Add-ons
   Community
   Blog

Follow Us

   Instagram
   YouTube
   TikTok
   Bluesky
   Podcast

Firefox

   Website Privacy Notice
   Terms of Use
   Cookie Policy
   Community Participation Guidelines
   Logo Trademark Licensing

Powered by Mozilla

Putting people before profits since 1998 ___________________________________________________ Wierd. Thanks. Greg

After a re-start, my Firefox browser on a Dell laptop lost all history and has since also not been collecting websites visited. When opening a new tab, the shortcuts and recently visited websites are also gone and no longer being collected. My CCleaner recently updated itself to a new version but I unchecked the delete history for Firefox (which treacherously is clicked by default - I fell into that trap before). Happy to blame the new CCleaner but that would not explain why history is not being collected now - to me the fault seems to lie with Firefox instead. Another possibility that went through my mind: Is Microsoft sabotaging users of Windows 11 to force them to buy new? PS: Under "Privacy", "History", the setting is "Firefox will remember history", as it always has been and should be. But it has forgotten all previous history and it is no longer collecting any new history either!

I was thinking use clear data to free up some space for my storage, so I sync with sync 0 min ago display. I log back in, everything disappear. Little stressed. Anyway to get back my data?

Other info: Before press sync, did display sync 3 min ago, after press sync, display sync 0 min ago

Account only use on Android, doesn't sync to other device

I have Firefox installed on three Windows Desktop Computers. On one, I just cannot delete Bookmarks, no matter what suggestions I try. Verify Integrity of the database produced no results. I do not, for a variety of reasons, sync bookmarks (or anything else) between the three installations. Experienced user that has spent far too long on what should be a simple issue.

Hello, due to problems with the Firefox Beta (for Android), I switched to the stable version. However, with this version I also encounterd some problems, mainly regarding the homepage: In the beta version collections are displayed (at the bottom) of the homepage. In my stable version, I cannot see the collections at all. I can still add sites to collections, and when doing so, all my collections are shown but I don't know how to access them. I could not find anything about it in the settings. Is this the regular behavior? If not, how can I change it?

Best regards

I made the mistake I will never make again of signing into a Mozilla account in Firefox. Suddenly everything about the browser was completely different. I realized it had synced to my primary computer without asking me a [expletive] thing about what I wanted to sync or if I wanted to do that now.

How do I unsync the second computer so that Firefox goes back to the way it was before the unexpected forced sync? I had those settings the way I wanted them for a reason.

Firefox 143.0.4 on Ubuntu 24.04

When I am scolling and the mouse hits an image, a large image preview appears. How on earth do I turn this off? I can see tab preview images to turn off but not this stupid image previre thing that covers everything I am trying to read or navigate on the web site.

Thanks very much M

Never seen this before. I installed v143.0.4 on 10/3. Since it was an extended length of time up to now, I went to check (Image 1 & 2)

I still wasn't convinced (Image 3)

Also, I never opt to "Automatically Install Updates". I don't know how that got selected, but even so, it did not work.

Explanation please?

Hello Firefox Support Team,

Thank you for providing such an excellent browser, free of charge and without advertisements.

I am experiencing an issue on my Samsung J5 running Android 5. When I try to set Firefox as the default browser, I am redirected to an information page. While helpful, it does not mention that Firefox cannot be set as the default browser on Android versions below 8.

It would be clearer if this limitation were explicitly stated on that page.

Thank you for your attention, and best regards to the entire Firefox team.

Maybe this is counter intuitive, and/or I don't understand pinned tabs, but is there a way to have pinned tabs visible in the tabs list, instead of hidden.

I find it very inconvenient in a variety of ways.

Hi all, I remember in older versions of Firefox (within the past 6 months) that pdfs embedded in a page would be a hyperlink that you had to click which would open in another tab. Now pdfs automatically open which is very annoying as it makes it difficult to read, while I found a way to open it in another tab I was wondering if there is a setting I can disable so I can just click on a hyperlink.

Thanks in advance