Diễn đàn hỗ trợ Firefox

I accidentally messed it up when trying to remove the desktop icon because I already set Firefox in my taskbar. Now I get an unfamiliar screen and my settings, including bookmarks, are gone. Is it possible to set my laptop to undo changes made today?

I have two machines running Windows 10 and Firefox 64 bit (synchronised and up-to-date). I recently noticed that the desktop is missing several Firefox bookmark folders, which contain hundreds of bookmarks.

How do I get the desktop fully synchronised with the laptop? Do I use backup? If I am to use backup, how do I see what is in backup, so that I know it is backimg up correctly? Do I reinstall the Firefox and import from backup?

Ich habe seit einiger Zeit Probleme mit unterschiedlichen Login Masken die nicht korrekt angezeigt werden.

Z.B. Online Banking, Synology NAS, etc. Ich habe Firefox jetzt schon drei Mal neu installiert, dann geht es gefühlt ein paar Tage, jetzt kann ich mich nicht mehr auf meiner Synology NAS anmelden, weil die Login Seite nicht angezeigt wird. Verwende ich z.B. EDGE funktioniert es einwandfrei!!

Igend eine Idee ?

Mit freundlichen Grüßen

Volker Heyne

I am getting the following error message when using Firefox. The bookmarks and history system will not be functional because one of Firefox's files is in use by another application. Some security software can cause this problem. I cannot see my bookmarks or add new ones. I followed the directions in articles about this problem and they did not. help. I decided to uninstall Firefox and l re-installed it from scratch and i still get the same error message.

It seems to me that recovery from backup only allows one to recover ALL bookmarks. But maybe one wants to recover only one folder, or only a few folders. Can that be done? If so, how?

Every time I change my password or I try to change my password I get notifications double notifications actually one with an eight digit number one with the six digit number it's going to the same account but it's also going to another account in another town how do I stop this

On closing down firefox. My browsing history still remains.I have all the boxes ticked that need to be ticked to perform this.Settings also are all ticked and saved. it was all working fine 2 days ago. came back ontoday and stopped working. can any one help. Also my firefox icon/tile/shortcut in my taskbar has changed from firefox icon to being a white folder with top right coner folded over.Anyone have any ideas whats going on.

Moderator note: This question has been edited to remove an unintended link.

Hi, The site https://fortunenette.fr/ does not display properly in Firefox on my MacBook Pro running macOS 15.7.3 (build 24G419).

The header and navigation load fine, but the biography articles and the richest people table stay blank or show only placeholders. In the Firefox Console I see these errors: Uncaught TypeError reading 'length' of undefined, mixed content blocks for HTTP resources on an HTTPS page, and several CSP violations for inline scripts.

I already cleared cache and cookies, disabled all extensions, tried Private Browsing, turned off Enhanced Tracking Protection, and changed some about:config settings like strict transport security. Nothing helped.

The site loads perfectly in Safari and Chrome on the same Mac. It happens in Firefox 147.0 and the 148.0b2 beta too.

It seems like a Gecko-specific JavaScript or rendering problem. Has anyone else run into this? Any workaround without switching browsers?

On Chrome, web push notifications show the full origin (e.g. pl2.forgeofempires.com), but on Firefox only the notification text is visible, without the website address. Is this a Firefox limitation by design, or is there any way to enable showing the full origin in notifications?

I've been annoyed recently to see the Firefox symbol on both my Desktop and in the taskbar and finding that there are two in the taskbar when I open one. The bottom line is that I seem to have completely obliterated Firefox as I'd had it set up! Can I restore my Firefox settings to where they were yesterday?

www.russellmoccasin.com won't load properly on any browser on my macbook pro running Mac OS 15.7.3. I don't have any browser extensions running, I've cleared my browser history, cookies, and cache. Still won't work. When I disabled javascript on safari and firefox, the website loaded perfectly. But I have to have JS running to use almost every other website on the internet, so what gives??

New laptop. Installed Firefox. Set up 2 of the "new" type profiles. Typical extensions (Bitwarden, Bit.ly, Firefox Color). Not too long after, Firefox will no longer launch and the only remediation I've found is to do a clean uninstall/reinstall including deleting registry keys. I've now done this three times now. Environment information

• i7 Core Ultra/32GB RAM
• SentinelOne - Corporate Environment. Installs Firefox Extension. There are no signs in the S1 portal or client that it is blocking firefox.
• nVIDIA RTX PRO 500 Blackwell Video Card. Updated to current driver 582.16
• Threatlocker - Computer is new and has been in "Learning Mode" so it isn't an issue
• Tailscale runs on this machine, but it doesn't seem to make a difference if it is running.

Nothing in the %APPDATA% crash reports folder for firefox. Crash dumps for firefox are in %LOCALAPPDATA%/CrashDumps. One read by AppCrashView is attached. It is a 0xc0000005 Access violation in StackHash_2264.

This is a problem where renaming the firefox.exe to firefox1.exe will get it to run but it seems to lose track of profiles.

Firefox is my favorite browser and I'd like to resolve this, but I really can't afford spending much more time on it or continually clean reinstalling and rebuilding profies. I've seen other similar posts, but no clear resolution.

Hi.

With last updates on firefox desktop..(2 last updates)..every update reset all my websites logins..I had to relogin again in all my websites..what happened?..is normal?..or error?

Dans free.tv pourquoi la suppression des sous-titres ne fonctionne pas problème Mozilla ou Free.tv ?

Hi, Since the last update for Mozilla on the laptop (updated on 6/Oct/2025 - version 143.0.4 (64-bit)), all the shortcuts to websites in Firefox homepage I had pinned have disappeared. Also I can't add new shortcuts. I already have shortcuts enabled in Settings>Home>Firefox Home Content>Shortcuts.

Does anyone know how to solve this?

Kind regards.

Bárbara O.

The first time i'm installing Firefox it quickly made me fall in love with this browser and wanted to fully migrate from Chrome to Firefox, it's more lightweight, has more customization, fully private & secure. But there is only one thing that made me just almost migrate to Firefox, or just 99% complete transitioning to Firefox, and that is me unable downloading. Yes, thats it and it's pretty annoying. I just able downloading pictures, but not when i'm downloading an apps or software like Discord for example. PLEASE HELP ME, MY LAPTOP (X240) IS VERY OLD AND I NEED EVERY PERFORMANCE ON MY LAPTOP FOR WORKSTATION PLUS WITH THIS RAM PRICES (ykwim). Tomorrow i'm planning to switch to Linux (Mint MATE) and i have to do dual-boot just incase there is some software i'm unable to use at Linux. So please, help me. Give each step with no technical explanation, and use beginner languange so i'm easier to understand.

I'm trying to setup 2fa on my account. It requires sending a code to my email which I then use to verify. These codes consistently are sent outside of the time window and as a result expired. I've added accounts@firefox.com to my contacts, and I've tried this on firefox desktop and firefox mobile on an iphone, and both produce the same results.

I'm on a gmail account and gmail flags these emails as suspicious despite being added as a contact, which likely means they are poorly formatted. Despite this flag, they are still sent to my inbox when they finally arrive.

This is incredibly frustrating as this is a service provided by basically every company and yet I have never seen it perform this poorly as it has with firefox.

since yesterday whenever I try to open Firefox, it just crashes immediately. I get the option to choose a profile but after I choose I see the window open very briefly and it closes immediately after and gives me the crash report thing. I don't want to reinstall as my data is on there and I'm not sure if it's linked to an account or no.