Diễn đàn hỗ trợ Firefox

This is a weird one and I'm hoping there's a reassuring explanation.

I had Firefox and Sumatra PDF open, nothing else on Win 10.

I switched from Sumatra to Firefox (1 tab open), searched for something, and Firefox froze, and after a while Windows gave me an option to terminate the non-responsive program, which I did, and Firefox closed.

But the hard disk was active 100% afterwards, and everything slowed to a crawl, and I couldn't even get the Task Manager to open, so I did what I haven't done in many ages, killed the power. (Experience tells me a memory leak.)

After the restart Firefox opened, a bit slowly, to the last open tab. Browsed a bit. All is fine. Closed Firefox, opened it again, and now I'm logged out of every website, including the saved preferences, e.g. of Wikipedia.

It's worth pointing out that I closed Sumatra just fine, but it too lost the history (it remembers which page I last viewed for the opened documents).

Since Firefox was the one to freeze, and to work fine afterwards, logged in and all, then lose all after opening it again, I'm not sure what happened, and if there's anything I can do.

Sorry for the lengthy post, but basically:

Is that expected after a freeze/recovery?

In Firefox, I have several windows open, each with many tabs. (And BTW, I love the Firefox tab-organization feature.) I would like to empty the cache and delete all cookies. Will that close the open tabs? Is there a way to delete the cookies, empty the cache and preserve all windows & tabs?

      Thank you!

When I try to log on to a particular web page using my password, I get an error page. When I do so using the Private browse function it works. Following is the error I get: {

 "callId": "019a1701de257ed0a722da6257f2896e",
 "errorCode": 403005,
 "errorDetails": "Unauthorized user",
 "errorMessage": "Unauthorized user",
 "apiVersion": 2,
 "statusCode": 403,
 "statusReason": "Forbidden",
 "time": "2025-10-24T16:16:29.758Z"

}

Does anyone have any great ideas??

I recently noticed that my Microsoft account remains active after I sign out if I press the back button. All my personal and account information is still displayed, indicating that the account is still signed in. I even tried clearing all browsing data and history, but that didn't resolve the issue. This doesn't happen with my Gmail account, nor when I access my Microsoft account using Edge or Chrome.

I understand that closing the browser likely signs me out, but I have no way to confirm that unless I check for active devices in my account settings. Can you explain why this timeout issue occurs? It seems odd, especially since Mozilla prioritizes security and privacy.

I've been trying to get Firefox to save cookies for a few desired websites (bank, investment accounts website, Sync... and of course Firefox/Mozilla itself) so I don't have to constantly use the 2FAs for those accounts. Firefox refuses to keep me logged in to my Mozilla/Firefox account. Every few hours -- or at the very least, after a machine shut-down -- I have to re-login if I re-start Firefox.

I do not use the Firefox Password Manager; it's unchecked in Settings. Nor do I use the Autofill options in Settings. I use the Bitwarden Extension (set to Never for locking/logout -- because this is a home computer) for Firefox to log in to my sites, with a separate authenticator app, Authy.

The Firefox Privacy & Security Settings for tracking cookie blocking are the Standard ones; I haven't done anything to customize them. Further down on that page, I've tried leaving the box blank for clearing cookies on exit. I've tried checking the box and setting up exceptions for those few sites I'd like to login to without having to go through the 2FA rigamarole. I've done multiple Refreshes, clearing of History, uninstall/reinstalls including deletion of every Firefox profile and anything hinting at a connection to Mozilla or Firefox in all Users on the computer, including all the AppData folders. A few days ago, I even deleted the Mozilla/Firefox account and set up a new one with a different email address.

Nothing seems to work. Most recently, Firefox still had all the relevant cookies after the computer was shut down overnight, but an hour into my day's work, after closing Firefox and re-opening it a short while later, all the cookies are gone once again!

None of this was an issue about three months ago. I could save the desired cookies, get rid of other ones, use private browsing, etc. etc., with basically the same set-up and with the Mozilla/Firefox account I had had for years. Now, I've had to delete that account in an apparently vain effort to try to clear out anything "Mozilla" from this computer -- and it didn't work anyhow.

(I posted about this same issue a week or so ago, but didn't receive any responses and have now deleted that Mozilla/Firefox account -- see above -- so this message is an update.)

Every time Microsoft updates my computer, or I shut it down and restart it, all the sites I use regularly do not recognize my computer and require me to identify myself (plus giving me messages that I am logging in from an unknown computer). What can I do to stop this?

Starting today, if I use google search in Firefox it ALWAYS says i am robot and I have to Recaptcha puzzles. I have done everything with my computer, cleared cache/history, rebooted router/chose "No Proxy" for Internet access/ and searched for viruses/malware etc. Using latest version of Firefox 138.0.1 I am also already logged into my Google account. Dont have this issue if I use google with other browsers such as Edge or Chrome. on a Dell PC using Windows 10.

I dont want to switch browsers but dont know how long I can put up with this. Wouldn't be surprised if Google did this on purpose to entice Firefox users to switch to Chrome.

Please HELP

I have the current version of Firefox browser. Every time I clear the browsing history, I am being logged out of my Google and Microsoft accounts, which is forcing me to go through the tedious 2-step verification process to log back in. This was not occuring before. Please fix this annoying and time consuming bug!

When I put my laptop to sleep, websites I am logged into are often logged out when I return. Note that I don't close Firefox. The tabs generally reopen but require login again. Windows 11, Firefox 137.0.1

For example, I put my laptop to sleep for lunch. When I returned, tabs were there, but I was logged out of gmail, Discord, and a website I was logged into.

This seems to happen more frequently recently, but not every time, as far as I know. But this is a relatively new problem, possibly related to a new laptop. Occasionally I get a message that there is trouble restoring my session.

Здравствуйте, у меня возникла проблема: пользуюсь браузером с компьютера, в какой то момент , каждый раз при закрытии окна все аккаунты на всех сайтах разлогиниваются. Приходится каждый раз везде снова авторизоваться. В чем может быть проблема? Где то капался в настройках, разрешал сохранение cookies но это так и не помогло, может быть я просто не все места нашёл и не везде передвинул бегунки.... Вроде в некоторых браузерах бывает такая настройка, специальная. Если она есть в фаер фоксе - скажите, пожалуйста, как её отключить? Если её нет - подскажите какие ещё могут быть варианты?

Пожалуйста дайте ответ с конкретными путями действий , или со скриншотами

Hi folks

I have a particularly infuriating problem. A few weeks back, Firefox stopped displaying my usernames and passwords whenever I wanted to log into a site. This coincided with my installing BitDefender, although I don't know why.

Through googling I eventually realised I could go into about:config to fix this. signon.rememberSignons displays as false, when I turn it to true it fixes the issue.

But here is the problem I can't solve. Everytime I restart firefox or my PC / Mac (I am using both, with a syncronised account on both windows and MacOS) it sets signon.rememberSignons to false AGAIN. Which means every single time I browse I have to go into about:config and fix this. Maddening.

Please can you help?

здравстуйте, как сделать чтобы при входе в фаерфокс он не выходил из аккаунтов? например я захожу история сохраняется вкладки остаются но из аккаунтов он выходит и приходится каждый раз заходить заново

bold text