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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.

This is the message I receive when I try to sign in to my Adobe account online:

Hmm. We’re having trouble finding that site.

We can’t connect to the server at auth.services.adobe.com.

If you entered the right address, you can:

   Try again later
   Check your network connection
   Check that Firefox has permission to access the web (you might be connected but behind a firewall)

__________________________________________

How do I check that Firefox has permission to access this page? Or, what else do I need to do to sign in to my account?

Thank you!

8 out of 10 times that i try to connect to the following site:

https://www.tax.ny.gov/online/

I get the following error message:

Secure Connection Failed

An error occurred during a connection to otc.tax.ny.gov. PR_CONNECT_RESET_ERROR

Error code: PR_CONNECT_RESET_ERROR

   The page you are trying to view cannot be shown because the authenticity of the received data could not be verified.
   Please contact the website owners to inform them of this problem.

Now and then, I'm able to log in successfully. lately though, I'm having trouble logging in using Firefox browser.

This is becoming very frustrating. What could be the issue? What do i need to do to resolve the problem?

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

I got the new FF update this morning and noticed shortly after when i got back online a bd_config.cfg file popped up onto my desktop windows 10. I deleted it not thinking anything about it and when back online again and it popped up again in fact everytime i did this it popped up no matter what i did and went online.

It has something to do with BitDefender i figured out uninstalled bit defender re installed it no luck

Refreshed\Reset Firefox with no luck either.

I use Adguard app for Windows which causes long page loading times in Firefox due to extended TLS Handshakes. I have installed the Adguard certificate in Firefox, have turned off DOH in Firefox, etc. etc. but, the only way that I can get a page to load in a timely manner is by clicking on "reload current page" twice in Firefox. This is a delay in itself and is very inconvenient. I understand that the incompatibility of Firefox with Adguard is a known problem and am wondering whether Mozilla is working on a solution in cooperation with Adguard?

After instalation Eset Smart Security 18.2.18.0 with full security browsers my Firefox is run only in read-only mode. If I will be disable option Security browser and run Firefox that's working. Next I will be enable option Security browser then Firefox starts with green frame. After close Firefox and next run then starts read-only mode. Eset Team is not fair play becouse resolving problem only disable option Security browser. So why is there an option that prevents Firefox from launching? All my portable browsers without Eset Security working without any kind of problems, for example Tor, Opera.

commenting on Facebook results in a scroll down with every letter typed (default gboard) , which makes it almost impossible to comment, it becomes frustrating at times and i can only comment on posta which have a few comments because the scrolling down is blocked by the lower end of page

I have AdGuard app installed that uses a vpn to analyse the traffic and remove the ads even from the apps, not only from the browser.

When AdGuard (app) is turned on with its VPN feature (not an actual VPN, only to block ads), Firefox couldn't open any of the links. I have the certificate from AdGuard installed on my Android device, and even my bank apps trust it. The other browsers are working perfectly fine. Only Firefox couldn't load the pages.

All of a sudden when i sign in to Amazon I get this box: Windows Security: Please sign in to amazon .com: This request comes from Firefox.........: Never asked for it how do I turn it OFF?? I have no2FA in either Amazon or Firefox but all of a sudden i need to enter a Security Code.

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.

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.

out of nowhere my firefox bookmarks no longer appear. I am getting the following msg

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.

In an attempt to fix this problem, I have done the following:

• closed the browser and re-opened it
• rebooted my computer
• reinstalled my security software
• uninstalled firefox
• Reinstalled firefox

None of these steps have fixed the problem??????

Any ideas would be appreciated!

Moderator note: This question has been edited to correct the formatting.

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.