Hello, We have set a fixed proxy in Firefox on our employees' notebooks. However, when the notebooks do not have a VPN connection to our network, the proxy cannot be reached. Firefox then disables the proxy after a short time. I found the setting network.proxy.failover_direct under about:config and thought that setting it to false would solve the problem. However, Firefox behaves the same way. How can I prevent Firefox from accessing the internet except through the specified proxy? Thank you.