Firefox Community Forum

My virus software [ESET] continues to throw a warning for this site: https://smartadblock.net/febc/check.php, whether in FireFox or not.

The full message is this:

03/05/2026 12:34:31 PM;HTTP filter;file;https://smartadblock.net/febc/check.php?smarterBlockeruser=5a95aca1-0bc7-44aa-8530-b24c4663d295&smarterBlockerch=75779&smarterBlockerclck=KYYhsXKkLAiq86nMniI_QBbvIGZ_3n5L;JS/Redirector.SWD trojan;connection terminated;TRANZFORMATION\wally;Event occurred during an attempt to access the web by the application: C:\Program Files\Mozilla Firefox\firefox.exe (83D3842D579E5B6E2E5B055CCA4FB90933489C28).;08C31D6E8BB70C29570A45FB6BCACD9881E3C0DF;;S-1-5-21-500642325-2770745265-1048253706-1001;

This just started yesterday 3/4/2026

Can someone advise me on this?

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.

As mentioned, When google email account is open, opening another operative window, firefox automatically closes the email account. Why is this ? This looks to me as a possible bug or IE security program intervening to avoid cross connectivity and security violations between other opened windows. Correct ? This is annoying as an R&D engineer it is common to work with several opened windows. Any solutions or fixes ? rJ

I cannot access my xfinity account due to my anti-virus (Eset) blocking Firefox's access to assets.xfinity.com

Hello,

I'm using lasted version of Firefox Desktop and also using Kaspersky VPN. Whenever vpn is deactivated I cannot connect some websites. I just clicked and nothing happens. But if i tried with activated vpn, it's connecting.

I was trying to solve this problem but cant find solution.

PS. I did try on other browsers(Edge and Opera). I just connecting whatever is vpn status.

I am living in China and I used to be able to use a VPN with firefox without any problems.

Several months ago, I was suddenly only able to browse if I switched the VPN on (previously, it worked with or without (depending on whether the website was accessible from China).

I have recently changed VPN providers and now firefox doesn't browse at all.

Is there anything I should change in the settings?

Thanks

Why does Firefox think I am in Norway when I am in France? I use nordvpn for financial browsing but turn it off once I'm done. The VPN is not currently active, I have cleared cache and cookies and restarted Firefox and it still thinks I'm in Norway so search results are not accurate. Browser language is set to English and French. Thanks for any help in advance. UF

Firefox is not allowing me to reach links to medical portal websites to set up accounts saying they can't reach the site and perhaps a firewall is blocking it. I have other accounts on this same portal... HELP please.

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.

Error message: the bookmarks and history system will no be functional because one of Firefox's files is in use by another application. Some security software can cause this problem.

I tried following the directions in "learn more" but to no avail. Please help this senior citizen get his bookmarks back! Thank you.

I have disabled and removed any and all VPN's from my main unit. I have reloaded Firefox and cleaned the registry. Still getting the message and am unable to display images. Any ideas?

THE FOLLOWING SHOWED AFTER FIREFOX WAS UPDATED: NO SETTINGS HAVE BEEN CHANGEDTHE 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 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

why am i being asked to sign in to age verification sites when i have mozilla paid VPN installed and have enabled japan as the start point rather than UK  ? - Thanks

Why so many 'I am not a robot" picture checking and redundancy on motorcycles too? It's blocking my Firefox website address defaulting to Google's address bar? Only change I made was activating my AVAST security VPN subscription.