Komunitné fórum Firefox

My bookmarks, history and passwords have disappeared. I looked at the articles, refreshed firefox, have restarted firefox and my computer multiple times but cannot retrieve them.

This is the message when I start 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.

Hi, I have been trying all day to get my Trend Micro program working on my Firefox browser, including Password manager. These programs work ok on MS Edge browser, but I can't get it to work on my Firefox browser

For the past few days hot links in Thunderbird do not open in Firefox. Selecting a link in an email opens or brings to the fore a copy of Firefox with the link address and the wait icon but nothing else happens. I have to close Firefox, copy the link location, Past and Go in Firefox, and then the linked page appears. This behavior happens even in Troubleshoot Mode, so it is not any plugin or customization. I am also running Mozilla VPN. With VPN disabled, hot links in Thunderbird open in Firefox as expected. Now you know where to look.

Also, when I tried to add Troubleshooting Information below, nothing appeared. When I selected to option to be shown what to do, this page was replaced with other which deleted all this text, and now I am entering it all in again, which is severely frustrating. On a page where the user has entered possibly a volume of information, there should not be any sloppy risk of deleting that information due to page mishandling. Open help or assistance information in a separate tab, please. Think ahead about this stuff. You are supposed to be web design experts. Instead your web site spits in my face just when I am asking for help. Think. Plus, I had to get the Troubleshoot information manually so that is not being as automatic as it appears to be , either. Getting help should ideally be a button click, not jumping through hoops.

Like many, I have Windows 10 and cannot upgrade to Windows 11 without purchasing a new computer. I don't want the upgrade as my desktop computing needs are simple -- checking email and occasional online research. I am looking at 0patch as a solution to Microsoft discontinuing support for Windows 10 and want to know if Firefox will operate compatibly with 0patch providing security patches instead of Microsoft.

I'm not a technical person, so please keep replies simple. At 80 it's tough to keep up with all the changes! Thanks.

Bonjour. Depuis longtemps j'utilise Firefox Portable dand un bac à sable(SandBoxie-Plus). Depuis la dernière mise à jour Firefox plante, affiche incomplétement ou pas du tout la page. Je signale que sans le bac à sable Firefox fonctionne normalement. Actuellement je suis sur "WATERFOX" portable (version mai 2025) qui a l'air de fonctionner normalement.

RESTORE A TRUSTED RECIPE SITE banned by Mozilla: recipestonourish.com  !

I have been using this site for years. This morning Mozilla ruined it. Please restore, thank you!!

Carla van Raay [edited email from public]

Perth Western Australia

I have over 100 open tabs spread over 4 Mac desktops. I can no longer access ANY of them after upgrading to macOS Tahoe 26 and installing ESET Cyber Security Pro. I've used ESET with Firefox for many years without ANY problems. But now I have to choose between uninstalling ESET and being unprotected in order to use Firefox AT ALL. Every single webpage is blacked out with the message below. ESET support says that Firefox needs to issue an update to fix this problem.

Hello, I'm an avid user and supporter of Mozilla Firefox. But I installed AVAST as an additional protection tool...and I have just subscribed today to Avast Antitrack to avoid being tracked and hacked. But, to enable AntiTrack, I'm now prompted to add it to Firefox !? Before any action, I'd like to know that this will be efficient and safe : can you confirm that this is compatible with Firefox's proper operation? Thank you, P.Huens.

Hello,

we are observing big issues with mozilla firefox.

Few weeks ago it was impossible to use amazon with it.

Amazon support recommended us to not use the anti virus anymore, which was very strange. but it did not help.

After I add the antivirus addon to firefox it started to work. Unfortunatelly just for few weeks.

Actually we receive the following error and cannot browse or do anything Fehlercode: PR_CONNECT_RESET_ERROR

We have tried follwoing without success: - clearing cache - using problem investigation of firefox below button "help" - deinstalling and installing - installing the beta version

already after installation of firefox where normally terms and conditions to confirms shall appear we get the failure Fehlercode: PR_CONNECT_RESET_ERROR nd the content cannot be downloaded.

Hence Amazon does not work below google neighter and firefox is the only way o use amazon, we will appreciate your help.

Looking forward for your help

ags

Lost all of my bookmarks. Error message reads: "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 have been a Firefox user for years and years. I am having to leave because I cannot resolve this new issue. Can you help?

It can take many closing clicks to get rid of this warning and comes back again after a short while. What should I do? Tried searching with Malwarebytes itself and found no problems. Web search the same.

Malwarebytes Website blocked due to malvertising If you don't want to block .................................. IP Address: 108.62.60.42 port: 443 type: Outbound file: c:\Program Files\Mozilla Firefox\firefox.exe

When I open a new tab and enter any website name I cannot connect to any site and this has only just started The message I get reads cannot connect to server at gb.search.yahoo.com

I use Bitdefender as antivirus program. When I start up Firefox the antivirus program blocks the start up because it says Firefox is trying to access a program (sync.contextualadv.com) which does not have same authentification as the target. It gives me choice to accept this as an exception if I want. I don't understand the details but I don't want to allow this to proceed until I'm sure it is safe. I'm on an HP computer running Windows 11. I use firefox on another laptop running Windows 10 and have not had this problem.

I'm receiving this message 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.

Over the past 2 versions, I am having issues accessing a Linux Webmin (port 10000) site while using a VPN. I have no issue accessing this site when not over the VPN (on site) and I have no issue accessing the site while over VPN using another browser. Very strange issue.