Since few days I have a problem when opening a new private window, that leads to Firefox losing focus on this window: instead of letting me type as soon as the new window appears, I have to click on the search bar manually first. Browser also loses focus when it's starting. I must mention that the problem persists when starting Firefox in Safe Mode and after reinstalling and deleting profile information. Could this be related to a malware or virus? Malwarebytes detected 2 threats yesterday, but the system should be clean by now. Help please, it's really bugging me.