Firefox Community Forum

I was in contact with Bitdefender Support and they suggested the following:

If Facebook still won't open, open Bitdefender and:
  - Go to Protection > Online Threat Prevention > Settings.
  - Turn OFF "Encrypted Web Scan" temporarily.
  - Now reload Facebook in Firefox.

Afterwards, I also had to click on "Messenger" to get all my contacts.

This is temporary since before FF 150, Bitdefender ran with "Encrypted Web Scan", and I had no problem in loading Facebook. So something that changed in FF 150 conflicts with Bitdefender's "Encrypted Web Scan".

April 21, 2026 Tuesday

Thank you for your being here as a volunteer to answer this type of question:

IS eset.com security software compatible with Firefox Mozilla ?

Thank you,

Oliver Jeffrey

east@west.net 24/7 LA California

Hi. I run Pop_os 24.04 linux and have run the latest updated firefox for linux and the latest expressvpn for firefox and am not able to get firefox to connect with the vpn "on". It did work a week or so back but not now. With the vpn on, firefox takes at least 15 seconds to load. I've run the troubleshoot mode and it didn't help. Are there settings on firefox that could be the issue or is it a vpn problem? Thanks

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

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

Firefox only works properly if my VPN location is in Canada, but I'm in the US. If I switch my VPN to a US location (where I live), Firefox often does not work properly. I get news, ads, etc., that assume I'm Canadian. And often a website will not open. I need my VPN location in the US to access any site I normally do.

I have been unable to access any secure sites since I installed Norton 360 Antivirus. Whenever I try to access a secure site I receive the reply: Secure Connection Failed Error: PR_END_OF_FILE_ERROR I have tried all of the repairs listed on the internet but none have corrected the fault. I have also tried disabling Norton but also without success I have also tried uninstalling and re-installing Firefox but without success Can you suggest any other methods to correct this fault

I have accessed the particular website many times but today it says, "Hmm. We’re having trouble finding that site.

We can’t connect to the server at shop.naturalcompounder.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)"

hello team, I currently locate in China. days ago i have tried a vpn called "Veee". since then i could not log in many websites. i have asked Veee team but they say they dont know. it really sucks. i also asked AI tool but none of the method works. i think the vpn has changed some settings of my Firfox. because i can actually log in those websites with Edge. but i only want to use firefox. the errors either "cant connect" or something like refusing my access. please help. i love you guys.

Hello. I'd wriitten a few days ago about being blocked from firemountaingems.com I got help from Issis B. and was able to browse the site by turning off the VPN temporarily. Today, I am again blocked even with the temporary turn off of the VPN.

Is there a way you can show me easily step by step, how to exclude certain sites from the VPN permanently.

Thank you in adavance.

I would like to know what are the best Antivirus Protection to use with Firefox. Previous information is from 2011 and I would like to get more current information. Thank you