Diễn đàn hỗ trợ Firefox

When I try loading certain sites while using Proton VPN i get the following error message: Server Not Found. If I disable Proton VPN and enable the VPN on Firefox the site come right up. Can someone please tell me why this happens and how I can make these load using Proton VPN?

Every new version of firefox just gets slower and slower. Now with version 152.4, I try to load a website, it just continuously tries to load, doesn't even if load the page just has those 3 dots to indicate it is loading. Nothing ever loads

I am starting to think switching from firefox is necessary at this point because no other browser has this issue like firefox. No other browser consumes a ridiculous amount of memory like firefox does.

I did adjustments to my anti-virus as recommended, did the settings changes on firefox to speed it up as recommended, still same issue.

When you guys create a new update, please focus on speed over security and ensure it loads faster. I am likely going to revert back to an older update or switch browsers, because I don't care about security so much as actually loading a website.

Certain websites can be reached and displayed, however when using their page search, it says access denied on this server. I've tried using another browser but the same message comes up. However, on my phone, and tablets, I have no problem.

I have a problem with yfdnzfa.com coming up as blocked - malware in my Malwarebytes program every time I open your browser. Anyone else have this happening?

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

WHY DO I KEEP GETTING THIS ERROR???

"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 never got this before but now i get this every week. restarting my computer does not fix the problem. this sucks! the article to fix this are way too complicated. how do I fix this? I use Ccleaner and reboot, but that does nit fix the issue either. HELP!

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

Malwarebytes is picking up and blocking an outbound connection request from Firefox - www.highperformance.com. Anyone else experiencing this?

I've started getting Virus/Trogen warnings from McAfee popping up every few seconds on Firefox. There was a McAfee file on my Acer desktop but Not installed. Windows Defender and Malwarebytes do not detect a Virus or Trogen. Is this a SCAM by McAfee to get money from me? I cannot delete the McAfee install file as it says it is in use!

John Jenkins

when visiting websites using my vpn firefox blocks my entry. I have to disconnect my vpn to allow entry to sites. ive tries numerous fixes and nothing works its frustrating.