▽ヘルプとチュートリアル ●02/05 17:50 Captive portal detectionDescription of how Firefox detects captive portal networks.Install Firefox on LinuxThis article describes how to download and install Firefox on Linux.Insecure connection password warning in FirefoxFirefox will show you a "connection is not secure" warning message when a website login page is insecure and information could be stolen.