How does Firefox know my ISP login page?

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Music by Eric Matyas
https://www.soundimage.org
Track title: Peaceful Mind

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Chapters
00:00 Question
00:52 Accepted answer (Score 162)
06:55 Answer 2 (Score 57)
07:23 Answer 3 (Score 29)
09:24 Thank you

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Full question
https://superuser.com/questions/1489435/...

Question links:
[image]: https://i.stack.imgur.com/b0Mkg.png

Accepted answer links:
[Captive Portal]: https://wikipedia.org/wiki/Captive_porta...
http://captive.apple.com/
http://msftconnecttest.com/
http://connectivitycheck.gstatic.com/gen...
http://clients3.google.com/generate_204
http://detectportal.firefox.com/success....
[HTTP 204 ]: https://wikipedia.org/wiki/List_of_HTTP_...
[307 ]: https://wikipedia.org/wiki/List_of_HTTP_...
[SSL/TLS]: https://wikipedia.org/wiki/Transport_Lay...
[HTTP Strict Transport Security (HSTS)]: https://wikipedia.org/wiki/HTTP_Strict_T...
http://neverssl.com/

Answer 2 links:
http://detectportal.firefox.com/success....
http://support.moonpoint.com/network/web.../

Answer 3 links:
[@JörgWMittag answer]: https://superuser.com/a/1489610/84807
[WISPr]: https://en.wikipedia.org/wiki/WISPr
[Getting WISPr tags from a FON authentication portal]: https://unix.stackexchange.com/questions...
[Implementing a Captive portal using Apache]: https://unix.stackexchange.com/questions...
[Captive portal detection, popup implementation?]: https://unix.stackexchange.com/questions...
[Disabling CNA in MacOS]: https://unix.stackexchange.com/questions...
[How use a captive portal when in text mode?]: https://unix.stackexchange.com/questions...

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Tags
#firefox

#avk47