▽ヘルプとチュートリアル ●02/11 12:44 Captive portal detectionDescription of how Firefox detects captive portal networks.Common Myths about Private BrowsingLearn more about common misconceptions about Private Browsing in Firefox.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.