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Captive portal detection
Description of how Firefox detects captive portal networks.
Insecure connection password warning in Firefox
Firefox issues an insecure password warning when a web page's login form is not secure and your information could be stolen.
Website will not allow Firefox to display the page if another site has embedded it
This page explains the error: "Website will not allow Firefox to display the page if another site has embedded it"
Common Myths about Private Browsing
Learn more about common misconceptions about Private Browsing in Firefox.
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