788363 - DNS DisablePrefetch stopped working around Firefox 13

Status: RESOLVED WORKSFORME

(Core :: Networking: DNS, defect)

Description

[winders]

User Agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10.5; rv:15.0) Gecko/20100101 Firefox/15.0
Build ID: 20120824154833

Steps to reproduce:

Upgrade from Firefox 12 to 13, 14, 15.


Actual results:

during port 53 trace of Firefox 13 on Win7 x64, noticed that network.dns.disableprefetch set true no longer stopped Firefox from doing prefetch DNS lookups.

Observed similar behavior with Firefox 15 on OSX 10.5 x86.


Expected results:

Previously, prefetch DNS lookups did not occur if the preference was set to true.

This bug may be in some other component, but since the preference would indicate this module, I place it here.  IPv6 is active on all tested systems.

Comment 1

[Patrick McManus [:mcmanus]]

This feature is Works-For-Me using linux 64 nightly sep-5-2012, and also release FF15 linux-32bit.

1] made a new profile
2] set network.dns.disablePrefetch to be a boolean pref set to true
3] went to http://www.google.com (not logged into google, which will redirect to SSL and we don't prefetch from ssl) and searched for "hashtag"
4] watched a port 53 tcpdump

I then repeated the process without the pref to ensure prefetch was still working.

please doublecheck the following and let us know if it is still a problem.

1] the name of the pref is case sensitive and it is a hidden pref so you need to type it in
2] the pref is boolean
3] the pref is set to true

Comment 2

[winders]

Hello,

It was the case sensitivity.

Prefetches are properly quenched now.

Thank you!