Hello, I use Windows 11 on my PC in France. I lost all my Firefox bookmarks and browsing history some time ago. When I try to use Firefox I get the message : Firefox is not operational because one of the Firefox files is being used by another application. I have tried to get an explanation on firefox.fr but to no avail, their support page is far too complex. I can still browse with Frefox but no bookmarks, so it defeats the purpose... Please help if you can as I now have to resort to Google Chrome, wich is not as versatile and I would really like to be able to use Firefox again. Thanks. Raymond