Normally, when you run a VPN at the Windows level (not just through a browser extension), all your browsers should go through the same tunnel. You could double-check that Firefox is set to follow your Windows settings: You can check that here: * Windows: "3-bar" menu button (or Tools menu) > Options * Mac: "3-bar" menu button (or Firefox menu) > Preferences * Linux: "3-bar" menu button (or Edit menu) > Preferences * Any system: type or paste '''about:preferences''' into the address bar and press Enter/Return to load it In the search box at the top of the page, type ''proxy'' and Firefox should filter to the "Settings" button, which you can click. The default of "Use system proxy settings" should piggybacks on your Windows/IE "LAN" setting. I usually don't recommend "Auto-detect" because it can lead to a flaky connection, but if the default setting doesn't work, you could try it. You also could try "No proxy". Can you get it working?