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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.

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.

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.

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

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.

When I try and connect to a site with firefox I get a message saying "Check that Firefox hass permission to access the web (you might be connected but behind a firewall) How can I get check to see if I am behind the firewall and if so how can I get out to connect to that specific site.

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

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)"

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.