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Insecure connection password warning in Firefox
Firefox will show you a "connection is not secure" warning message when a website login page is insecure and information could be stolen.
Update Firefox to the latest release
Firefox automatically updates itself by default, but you can always do a manual update. Learn how to update Firefox on Windows, Mac, or Linux.
Captive portal detection
Description of how Firefox detects captive portal networks.
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"
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