firefox后台连接fxfeeds.mozilla.org很诡秘

qwerqwer

每次打开firefox ，都会有以下的网络连接，数据来自 `tcpdump -an`


19:44:05.629422 PPPoE  [ses 0x13a2] IP myhostname.1035 > DNSServerNo1.53:  743+ AAAA? fxfeeds.mozilla.org. (37)
19:44:05.678967 PPPoE  [ses 0x13a2] IP DNSServerNo1.53 > myhostname.1035:  743 0/1/0 (86)
19:44:05.683984 PPPoE  [ses 0x13a2] IP myhostname.1035 > DNSServerNo1.53:  58469+ AAAA? fxfeeds.mozilla.org.domain. (44)
19:44:05.733214 PPPoE  [ses 0x13a2] IP DNSServerNo1.53 > myhostname.1035:  58469 NXDomain 0/1/0 (119)
19:44:05.735623 PPPoE  [ses 0x13a2] IP myhostname.1035 > DNSServerNo1.53:  56851+ A? fxfeeds.mozilla.org. (37)
19:44:05.784425 PPPoE  [ses 0x13a2] IP DNSServerNo1.53 > myhostname.1035:  56851 1/4/0 (134)
19:44:05.785524 PPPoE  [ses 0x13a2] IP myhostname.3418 > 63.245.209.21.80: S 2400403739:2400403739(0) win 5808 <mss 1452,sackOK,timestamp 1883060 0,nop,wscale 2>
19:44:06.023217 PPPoE  [ses 0x13a2] IP 63.245.209.21.80 > myhostname.3418: S 2948410214:2948410214(0) ack 2400403740 win 8190 <mss 1452>
19:44:06.023319 PPPoE  [ses 0x13a2] IP myhostname.3418 > 63.245.209.21.80: . ack 1 win 5808
19:44:06.023746 PPPoE  [ses 0x13a2] IP myhostname.3418 > 63.245.209.21.80: P 1:430(429) ack 1 win 5808
19:44:06.275568 PPPoE  [ses 0x13a2] IP truncated-ip - 512 bytes missing! 63.245.209.21.80 > myhostname.3418: P 1:678(677) ack 430 win 8190
19:44:06.275687 PPPoE  [ses 0x13a2] IP myhostname.3418 > 63.245.209.21.80: . ack 678 win 6770
19:44:06.290473 PPPoE  [ses 0x13a2] IP myhostname.1035 > DNSServerNo1.53:  13601+ AAAA? newsrss.bbc.co.uk. (35)
19:44:07.004400 PPPoE  [ses 0x13a2] IP DNSServerNo1.53 > myhostname.1035:  13601 1/0/0 (65)
19:44:07.004952 PPPoE  [ses 0x13a2] IP myhostname.1035 > DNSServerNo1.53:  8143+ A? newsrss.bbc.co.uk. (35)
19:44:07.053661 PPPoE  [ses 0x13a2] IP DNSServerNo1.53 > myhostname.1035:  8143 2/2/2[|domain]
19:44:07.054693 PPPoE  [ses 0x13a2] IP myhostname.22965 > 212.58.240.133.80: S 2400017407:2400017407(0) win 5808 <mss 1452,sackOK,timestamp 1883377 0,nop,wscale 2>


PING fxfeeds.mozilla.org (63.245.209.21) 56(84) bytes of data
正常

ping newsrss.bbc.co.uk
PING newsrss.bbc.net.uk (212.58.240.42) 56(84) bytes of data
ping不通


我尝试 grep -R  newsrss.bbc.co.uk  ~/*
没有线索。
grep -R newsrss.bbc.co.uk  /usr/lib/firefox/*
没有线索。

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