Firefox Community Forum

In new version i can switch between search engines, but it makes me to many clicks. In old version, i just clicked icons in bottom and it become search in this engine. How to bak to the old version?

Ich habe die Firefox-Einstellungen von einem alten Windows10 Rechner auf den neuen Windows11 PC mit den Profildateien übertragen, hat gut geklappt.. Jetzt hatte ich die Meldung erhalten " der Treiber cpuz419_x64.sys konnte nicht installiert werden wegen möglicher Virus-Gefährdung", als Abhilfe wurde angeboten die Ker-Sicherung auszuschlaten. Das habe ich mir nicht getraut. Als weitere Info erschien eine Seite, auf der "Windows10" unterstrichen war. Könnte das alte Profil dem Rechner vorgaukeln, dass ich Windows 10 nutze?bold text

This has worked fine in the past, and works now in Chrome, but not Firefox. URL is https://outlook.cloud.microsoft/mail/?bO=1&msalAuthRedirect=true&sessionId=20fbbbb0-2fa6-4848-8fec-c20c6d3a8be4

Here's the error message

UTC Date: 2026-03-30T12:16:32.476Z Client Id: 05099EAAAC364C6EBD8115436A25F2D9 Session Id: 20fbbbb0-2fa6-4848-8fec-c20c6d3a8be4 Client Version: 20260320002.06 BootResult: fail Back Filled Errors: Unhandled Rejection: SyntaxError: JSON.parse: unexpected end of data at line 1 column 1 of the JSON data:undefined|undefined:undefined|undefined:undefined|undefined:undefined err: Error: 401 esrc: StartupData et: ServerError estack: y@https://res.public.onecdn.static.microsoft/owamail/hashed-v1/scripts/owa.mailindex.06b8e674.js:2:299099 165332/E/<@https://res.public.onecdn.static.microsoft/owamail/hashed-v1/scripts/owa.mailindex.06b8e674.js:2:23542

st: 401 efe: BL0PR02CA0036

Hi, I'm Albert.

I had like 10,000 open tabs (not exaggerating) and these tabs are gone after a blue screen error and a few Windows updates. I want to restore those tabs, but I can not because the "Restore the previous session" option is grayed out.

Are there ways to restore these open tabs?

If there isn't one, then I want to restore all the websites I have visited over the past few years and manually filter them.

How do I do it?

The Firefox library contains history but the oldest history it contains is 2024 December one. I guess the dedicated folder removed my old browsing history as it was filled up?

What I read is that places.sqlite file contains all the browsing history. Is this right? My places.sqlite file size is 80.0 MB (83,886,080 bytes). Is there a size limit on this file? I wonder if this file contains all my browsing history.

I have my places.sqlite file and DB Browser installed on my computer. But I don't know what to do next after opening places.sqlite file.

If there are better suited applications for my purpose than DB Browser, please recommend me one with a little instruction.

Long story short, how do I restore my open tabs or browsing history?

Please help me.

Since the most recent update installed on Firefox, my homepage no longer loads on opening the browser. Instead, a blank page loads, and I have to hit the home button in order to get to my home page. I've checked and none of my settings have changed, so don't see what else it can be other than some kind of bug?

Hello! Firefox doesn't load the designated starting page I listed. It starts on the general overview. I have this issue since the last update. Refreshing or deinstalling didn't fix the issue. The desired page is also listed as start page under about:config as starting page Thank you in advance for your help

I thought I would report that after updating Firefox to version 149.0, I had no audio initially in YouTube videos but before I had NO problem with any. For a Firefox video sound example, the video played audio fine at: https://www.youtube.com/watch?v=LtOGa5M8AuU. My computer audio worked fine in Windows System. I did not change any YouTube audio setting in the videos. Audio is not blocked. After clicking on more videos and trying to play them, the audio is now getting back to the way it used to work although the audio setting are still the same. This is really weird and has wasted some of my time.

Also, after the Firefox update, now I cannot drag and drop a URL into a Bookmarks folder from the URL bar or whatever it's called after doing a Search with DuckDuckGo or with Google with the "Search and turn off Show search terms in the address bar on results pages option" turned off! I did not change any setting in Firefox to cause this issue.

I now wish I had not have updated Firefox! Please resolve dragging URL issue and hopefully whatever caused the audio problem will not occur again.

I installed update 149 and since then, the VPN (NORDVPN) often will not start up and I have to restart the computer. If this cannot be fixed, I would like to go back to the previous version which gave me no trouble. thanks Brian

Bonjour Je suis "harcelé" par des notifications (cf fichier joint) qui m'annonce, un virus detecté, un cheval de Troie, une alerte système, une erreur critique... en m'indiquant toujours via d75ag1anaffc73bd3jj0.jhec-defender.pro J'ai beau cliquer, je n'obtiens rien sauf assez souvent une connexion à Avast (qui n'est pas installé sur ma machine !) et qui me détecte aussitôt de 3 à 5 virus... mais qui ne être supprimé que par une version payante d'Avast Réelle menace ou publicité agressive ? Comment se débarrasser de cela sans bloquer toutes les notifications de Windows Defender ? Cordialement

Google seems to be slowing down my PC. So I deleted google and installed Mozilla. I set Mozilla as my default browser but google is still there. How do I get rid of google?

I use Firefox as it is one of the last good browsers that isn't chromium based. However, I use it for work and like a nice clean PROFESSIONAL look.

With the introduction of version 149, I see new cartoonish fox icons pop up all over the place. After a little research it appears to be Kit, the firefox mascot.

Let me be clear, I don't hate the mascot, he's cute. But that is not what I want in a browser. I find his appearance and lack of ability to eliminate him infuriating.

I try to run a firefox in a as minimalistic state as possible. Intruducutions of this character, make the browser feel cartoony and childish. Things I despise in an application. I know many people like him, but I would like the option to not have him appear in the application at all.

I was able to successfully remove him from the certificate warning page setting the flag: security.certerrors.felt-privacy-v1 --> FALSE.

However, I can't find other places to remove this nuisance. Take a look at the attached screenshot. Things like this are not welcome without a way to disable it.

Do you have any documentation or instructions I can use to disable this childish nonsense and restore an adult browser again?

Cannot get FireFox browser on my Windows 11 computer to sync with my Android mobile phone or the other way around. They both can see each other but they won't sync.

Hello,

I’ve been having a performance problem with Firefox that only happens when I play the Letter Boxed web game from the New York Times.

When I open the puzzle in Firefox (latest version), the letters load fine, but as soon as I start typing, the browser becomes laggy input delays, slow animations, and occasionally the whole tab freezes for a few seconds. I’ve tried the following, but none have fixed it:

Restarting Firefox Disabling all add-ons Clearing cache and cookies Updating Firefox to the latest version Running in Safe Mode

Other websites and games work normally, and the issue only appears with this specific NYT game. It also doesn’t happen in other browsers on the same machine.

System Info: ‑ OS: Windows 10 ‑ Firefox Version: (latest stable) ‑ RAM: 16 GB ‑ CPU: Intel i5

Questions:

Is this a known issue with Firefox and the Letter Boxed game? Are there specific settings (hardware acceleration, graphics) that I should adjust? How can I troubleshoot what is causing the lag within Firefox?

Any help would be greatly appreciated thanks in advance!

I love Firefox and have used it forever. But its memory usage is killing me lately and I'm seriously reconsidering.... PC, Win11, Intel7, 16GB memory. (I'm typing this from Chrome)

I've updated, restarted, but it keeps maxing out and slowing my computer to a crawl. Somebody please tell me there's a fix pending?