Firefox Community Forum

I am aware that Windows 10 will continue seeing support for the foreseeable future, but what about older versions and builds of 10?

I ask because I'm currently on a machine that physically can't update beyond version 1909 build 18363.1198 due to an issue that occurred on my machine in November 2020. So I've been stuck at that version and build of 10 for basically the last five years. While I'm trying to see if I can update it to 22h2, the last known version of Windows 10 with the hopes of enrolling in the extended security updates, that may not be feasible due to how old the mahcine itself is. Will Firefox continue to support all versions of 10 for the foreseeable future and not just those on the ESU? If so, great. If not, what version will be the last that can support the version I'm on? I don't have a Windows 11 machine yet on a full time basis (I'm testing an 11 machine out, but I may not end up keeping it) and I prefer 10 to begin with, so I would like to know when I need to stop updating Firefox itself, so that I can be sure I'll be able to keep using the browser with my current OS.

I recently upgraded from 128esr to 142, and one of the versions changed the tab mute button into a separate button.

How do I change it back to mute button on logo? if it isn't possible, can I remove the mute button

Mudei de computador e ao entrar com a chave de recuperação de conta, é informado de que ela está inválida. Ao tentar alterar minha senha sem a chave é informado erro, que não é possível realizar a operação. Quando tento alterar minha chave de recuperação , só tem opção de fazer a alteração entrando na minha conta, sendo que estou tentando alterar por não ter a chave de recuperação. Como posso sincromizar novamente ou gerar uma nova chave?

I clicked on a link in a forum site - pentaxforums.com - that should have pulled up image from a private web site but I think the url has been hijacked, the image didn't appear and instead the browser started pinging alerts. I have run avast anti virus and malwarebytes, these found suspicous malware (trojan, key clone) and rebooted, but these alerts still keep appearing, however I am wondering of the browser alert system itself has been compromised. See screenshots. if I click on one it seems to be trying to go to a suspicious url. any advice appreciated Marcus Brown

I had Firefox on my computer. Something went wrong with a Microsoft update on 8/15/25 (which I was not aware of) when I tried to restore my computer I found the update and it said I could not restore my Windows 10 version as it had been 10 days since the update. When I tried to re install Firefox I now get an error message that files are missing and I can't reinstall. Help me. I love Firefox and want to use it.

The following is the message I get is: System Restore failed to replace the file (C: \ProgramFiles\WindowsApps.temp\15191PeakPlayer.50533F9B98293_3.3.13.0_x64_y5c4dfz5b2 with its originalcopy from the restore point. An unspecified error occurred duringSystem Restore.(0x80070003)

Using touchpad and swiping fast right and left makes you go back or forward in your browser history. I want to disable it as its annoying especially when you get knocked back out of a page and loose what youre working on.

Hello, For some time now, links in Gmail e-mails are not working properly on Firefox (MacOS). If I click on the same link on the e-mail within the Mail app of MacOS, or using Gmail in Safari, it works fine. Even in the Mail app case, the links open in Firefox, so the problem is in Gmail within Firefox. I've had problems with links in e-mails coming from Amazon (I bought an e-gift card who's link did not work) and also in e-mails from Clarivate (Web of Science Alerts, links to the e-mailed records, image attached). Any suggestion on how to fix this problem? Thanks in advance.

Pedro

Hello community, I'm an embedded systems developer and we have a ressource constraint IOT device which is using TLS1.2. When we use https:// to access the internal website of the device, Firefox does a complete TLS handshake for each asset to download which renders https:// almost unusable. This happens despite session resumption using session IDs is offered by the device. When accessing the device with Chrome or Edge there's only one handshake and all the following TLS sessions are resumed with the ID of the first handshake. In Firefox security.ssl.disable_session_identifiers is set to false.

Is it intended behaviour that Firefox ignores session IDs for TLS1.2?

Used Firefox version: 142.0 (64-Bit) Windows 11

Thanks in advance.

Johannes

I'm following up on https://support.mozilla.org/en-US/questions/1492943 which seems to have been archived without having been solved.

The issue is still present, I would like to use gemini in the sidebar chat with a different account than the "default" google account and/or an account sandboxed within a container.

It's a firefox issue because firefox doesn't allow for the sidebar chat to be containerised to use a different google account. BTW, It works for chatgpt but not for gemini.

Since about a week ago, possibly after the recent update, the tool bar icon of Firefox stoped working - now its a blank "document" icon. When hovering over the tool bar icon, the minimized version of the window displays the correct firefox icon over it, the desktop icon is also correct, but the blank tool bar icon persists. Reinstalling the program did not help.

It is a minor bug, but it's quite annoying when working with other text documents with similiar icons, or just with a lot of programs open at the same time.

Hi, Firefox updated my browser to version 142.0 on the 24 Aug 2025. After shutting down my PC and reopening the next day, all my opened tabs in the browser were removed and have dissapeared? I have checked the history folder, but only tabs from after the update are available. Where have they all gone and how do i recover them. Very frustrated !!!

I tried to switch to English (GB) from (US) for spell check when I type on any search bars or commenting on a post but it always Stays in (US) English. I added the (GB) version and chose it as my main language, and restarted the machine with no luck. Can you please advice on how to troubleshoot it?

Please see screenshots for reference.

Was just curious about cookies and what they are doig on my system, I know what they are and what they do but wondered how bad they are for privacy and as well as performace on my machine. I apparently have 2.6gb of cookies, that's a lot of 1s and 0s! I am now going to delete them, but wondered all this time, are all of these cookies recording my every move on the internet and selling this data back to advertisers so I can be easily targeted??? I have ad-blockers anyway, just wondered if there is a good cookie killer?? Or are there any settings in Firefox I have missed.. I did see I did not have the 'strict' controls set which I will do now. Thanks.