Firefox Community Forum

Windows Defender is blocking Yandex.Ru, which is not even been tried to be access from. It showed in the Event Viewer that firefox.exe tried to reach Yandex.ru. Why is Firefox trying to reach there? There are no extensions apart from Firefox Multi-Account Containers installed.

Please advice.

Right below the search bar my browser has a warning "The security sandbox is disabled. Your configuration is unsupported and less secure."

I am on Windows 10. I have tried uninstalling firefox, removing appdata and all other firefox files and settings, resetting about:configs settings, disabling my BitDefender antivirus. Nothing fixes it. Completely fresh install of firefox still gives me that message. Sandbox level is default (9).

Any help would be appreciated.

I posted a question in here two days ago because my firefox wouldnt open anymore i got a follow up answer telling me to give the crash id but never got a follow up after i sent it . i tried shuffling between profiles and in the end got it working but today my pc had a crash while firefox was open and it had to restart when i tried to open firefox its as if i just installed it and i dont have any backups to be honest i tried checking the appdata folder and there is a profile folder that seems big enough that it might be mine but it doesnt seem like firefox is reading it for some reason i tried switching the data in the profile folder that firefox is considering but it didnt work .

Today following a brief power outage I was no longer able to sign in to AOL with Firefox on my desktop computer. I am able to sign in to all other apps with no problem. I tried clearing my cache, restarted Firefox, restarted my computer and spent 30 minutes on remote desktop access assistance with AOL trying to fix the problem with no success. I can log in to my account using Chrome on the desktop computer and can log in with no problem using my Android phone but can't log in using my desktop computer with Firefox. I've verified that my Firefox version is updated. I am running Windows 11 Pro.

I would greatly appreciate any helpful advice.

FF147.0.1 64bit Linux

I have about:config > toolkit.legacy ... stylesheets set to true, but how can I determine if FF actually 'loaded' the file <profile>/chrome/userChrome.css ?

Alternatively, is there a css tweak that is known to still be working in FF147?

today I tried using a link from discord to go to a site. a window I was unfamiliar with stating it was firefox told me to pick a profile. I had 2 at that point but I saw none at that point. I ignored it and did nothing. I restarted my computer later on after a file browser issue and when I tried to find my profiles and my last session I found nothing. my entire fire fox account has been wiped and I only have a single profile in my app data thats onlder than 2026. I have no idea whats happened.

Mid day Sunday my whole account disappeared and I had to create a new one. If this was an update I dont like it I dont have the time for this. Why did this happen. I have been a supporter for years and now not sure

Здравствуйте, проблема с восстановлением моих закладок. Дело в том что я продал свой пк и купил новый. И когда установил браузер. Вошел!! В свой аккаунт где были сохранены вск мои пароли и заметки просто исчезли. Я не знаю что делать. Доступа к старому пк у меня нет. Я не понимаю почему браузер не хочет восстанавливать мои закладки и все сохраненные сайты.

I use the Microsoft Defender Security portal (security.microsoft.com) in the Firefox browser. In this portal, if you click on the "?" in the top right of the page, a flyout window opens and you should see support options on how to get help from Microsoft. On Firefox, I get an error that says "You do not have access to this experience. Please contact your admin to request help and submit a ticket". Microsoft has told me this issue is not a Microsoft issue since this only happens on Firefox and not any other browser. I am seeking help from any Firefox experts to figure out why I am getting this error in Firefox and how I can resolve this issue. I am running version 147.0.1 (64 bit) of Firefox.

I have 4 rows of links on my desktop. How can I set these so that every article I read or You Tube video I watch doesn't replace something I want to stay on my desktop?

When Windows 11 reboots, and Firefox is restarted, it opens a very tiny window in the upper right part of the computer screen. Why is this? I believe I reported this before but it still is not resolved.

Firefox lost all my passwords and bookmarks, not in any of only 3 profiles. Now it won't enter new passwords and Mozilla/Firefox support not working. I don't know if this is even being entered

When I select a text and right-click, the option to translate by Firefox's native translation feature appears. The default target language for this seems to be the defined by locale; for my case, it's always Turkish. How do I choose a different target language to appear in the context menu? I cannot see an option for default target language in settings.

When there are many tabs open, the displayed tab line re-centers automatically obscuring the open tab. Is there a way to disable this mechanism, or to insist that the open tab is kept visible? The current mechanism that obscures the open tab is user unfriendly.

I run the current version of firefox on a Windows 11 Dell Inspiron Laptop. My bookmarks are here, but the tags have disappeared. This has happened once before, and it took several days to restore the tags. Why is this happening? How do I prevent it?

I have been using 1Password 7 to manage my login credentials. It includes a Firefox extension to fill in account names and passwords in login alerts and pages.

Firefox 147.0.1 (macOS aarch64) in January 2026 has broken 1Password 7's ability to fill in account names and passwords.

To reproduce: 1. Install 1Password 7 Version 7.9.11 (70911000) and its extension version 4.7.5.90 in Firefox 147.0.1 on macOS. 2. Visit a URL for which 1Password 7 has login credentials. 3. Click on the toolbar icon for 1Password 7. A 1Password 7 dialogue box pops down from the icon, containing the username and password for that URL. 4. Click the Autofill button in that dialogue box.

Observed behaviour: 1. Username and Password fields remain blank.

Expected behaviour: 1. Username and Password from 1Password 7 appear in the Username and Password fields.

For approximately the last three months, there was a partial failure similar to this. 1. 1Password 7 popdown dialogue moves from the toolbar icon to the Firefox tab for that URL. 2. Username and Password fields remain blank. 3. Workaround: click in the username field, then tab 2-4 times to further UI objects in the login credentials form. Then click the 1Password toolbar icon, then click the Autofill button in the popdown dialogue. Then, the Username and Password from 1Password 7 appear in the Username and Password fields.

The expected behaviour occurs for the same URLs in Safari.

Thus I suspect that Firefox has somehow changed its behaviour in the last few months to cause this regression. I have not changed the 1Password software versions in this time, because I am intentionally using a previous version of 1Password.

I am looking for a fix or workaround which works with my current 1Password software version. I am not interested in a solution which requires me to upgrade to the current version of 1Password. (The current version of 1Password imposes a feature which I am resisting.) I realise that this reduces the chance that I can persuade the Firefox team to find and correct this regression.