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I have been trying to get Firefox to clean up everything when I close it down,

It is so hard as if purposely a 1000 development team have worked on making it impossible.

When I close it down, it must be completely sanitised, no previous site visits, login names, passwords, suggestions - nothing.

And I should be able to achieve that with one button press, not have to go through a thousand individual settings.

I have now spent an hour checking and unchecking buttons, it is crazy. For example I go to the passwords, I have to delete each and every one individually. Maybe there is another screen somewhere, but when I want to interact with "Passwords" I naturally go to "Passwords".

And still, when I go to gmail, it autofills the gmail account! Where did that come from? I have spent an hour trying to make sure it deletes everything when it closes down.

And it should leave no trace on the PC. no temp files, nothing.

Hi ich habe versucht, die einstellungen zum einem fehlgeschlagenen login mit hilfe von chaptjpt zu verbessern. habe dadurch mein konto verändert. mein password neu erstellt und wiederherstellungsschlüssel ist nich korrekt. auf dem iphone ist alles drauf aber mit dem sekundären email adresse und das password ist auch weg wie kann ich die einstellungen lesezeichen auf den firefox im rechner übertragen?

schon mal Danke für die Hilfe

A couple days ago I started getting a blank page for the Firefox home page. FF is set as my default browser and FF default for windows and tabs. The home page was working fine but now I can't figure out how to get it back.

bold text On brand new DELL Alien-ware laptop with Windows 11 Firefox sometimes takes 30 seconds to open, Also once it is closed it cannot immediately open again. Error message shows Firefox is already opened and asks me to close it.

In the task manager under Apps running I see Firefox(12) when only the home page is open. Are those 12 hidden tabs or 12 parallel applications?

Have I made some errors in the Setup?

Today Firefox has suddenly started using ~20% of my CPU capacity, causing my cooling fan to run high most of the time. Since I had been running Firefox v.149.latest, I tried updating to v.150.0, but that made no difference.

It's not Firefox by itself (only Task Manager open) but whenever I open another tab with almost any website (including this one) that CPU usage spikes. What gives?!

Details: Running under Windows 10 Pro (yes, I have installed the ESU package, good until thi8s fall) on a Lenovo P1 Gen 2. Currently running Firefox inside a Sandboxie Pro v1.17.4 sandbox.

Please Help! -- jclarkw

After installing Mozilla on my mobile phone and syncing with my laptop all my bookmarks and history are GONE from my laptop. When attempting to restore them, following your suggested instructions, no dates appear when clicking the restore function. Deleted Mozilla from my mobile phone, still no good. Do I need to recreate all my bookmarks again?! How? When attempting to bookmark a new site it does NOT bookmark! No new history is showing either! Very disappointing, should I just return to windows again after years and years with Mozilla? Andrew S

First of all, I thank the great volunteers that have structured this great browser- Mozilla Firefox despite the persecutions from the giant Microsoft. I love Mozilla Firefox and I support it. I am of those who wrote petitions against Microsoft for undue negative manipulation of Mozilla Firefox. My petitions went to the European Union, Federal Trade Center, Independent Press Organization etc. The issue of my complaint about Mozilla Firefox is the non-functionality of Mozilla Firefox's Bookmark and History: The bookmark and History has had problem for a long-time. Most people who use Firefox admire the Bookmark and History. Once you open your computer window, on the left of the window, there is a list of your bookmark and you do not struggle to search for your favorite bookmark as in Microsoft Edge or Google It is there on your left. It is the gold standard of structuring a browser. No browser can compete with Mozilla Firefox in this respect. This is the reason Mozilla Firefox remains one of the best browsers ever. If it is Microsoft or any other group, they would have rushed to mend this defect. I know that Mozilla is made up of volunteers. Could any of the engineering volunteers see what I am saying?

06 May 2026 USA Just to inform users:

All mailboxes and all mail in profile are catastrophically and irretrievably deleted when I: 1. Change the location of the profile folder. 2. Make appropriate change in profiles.ini reflecting the location change. 3. Launch Thunderbird in Offline Mode (launching in OFFLINE mode is the fatal event). 4. Mailboxes will appear during this one launched session

    but
5. If Thunderbird is closed while still OFFLINE, then a re-launch of Thunderbird in any state will reveal
     that all mailboxes and all mail have been deleted.

All mailboxes, and of course, all mail in the profile are catastrophically and irretrievably deleted. I was lucky that I made a backup before changing profile location.

The deletion of mail and mailboxes occur at the close of Thunderbird's OFFLINE state. An examination of the profile folder indicates the destruction has occurred upon closing of Thunderbird in OFFLINE state.

It is not the re-launch of Thunderbird that causes the catastrophic deletion. The deletion occurred when Thunderbird was closed in its OFFLINE state.

To successfully change the profile location I must: 1. Make the change to profile location. 2. Make the appropriate change to profiles.ini 3. BE SURE to make the FIRST LAUNCH of Thunderbird in ONLINE mode--ONLINE only. 4. Once 1,2,3 are done, then Thunderbird does not corrupt the profile folder.

Conditions that MIGHT make my configuration uniquely affected: 1. I use Proton Mail Bridge in conjunction with Thunderbird. 2. My Profile folder is on a network share that is letter-mapped in Windows. 3. I have about 10 email addresses in Thunderbird that are Outlook IMAP, Gmail IMAP, and of course, Proton Mail.

I've been using Thunderbird a couple of years in this configuration with no problems. I just decided to rename my profile. So, this is my first discovery of the problem.