Hello,


I’m using the latest version of Firefox on my Windows 10 Home edition and
Linux Ubuntu 14.04 LTS desktops. I noticed that Firefox always sends two
DNS requests: A and AAAA requests. I did an experiment to see which API is
used by Firefox and found that the API getaddrinfo() does send 2 DNS
requests on my Linux machine while it sends only one A request on my
Windows machine. This doesn’t guarantee that Firefox always uses this API.
Does Firefox uses multiple APIs depending on the OS? I would like to know
which API does Firefox use when sending DNS requests.


Thank you for your help. This is part of my PhD research and I appreciate
your cooperation.

-- 
Sincerely,
Fatemah Alharbi
PhD Student
Computer Science Department
SID 861185554
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