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Is DNS prefetch disable broken in Firefox 13?

  • 4 replies
  • 4 have this problem
  • 1 view
  • Last reply by winders

winders
winders
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My quick comparison of 12 vs 13 seems to show that dns prefetching became active in 13 even though the disableprefetch setting was true.

Just seeking confirmation.

My quick comparison of 12 vs 13 seems to show that dns prefetching became active in 13 even though the disableprefetch setting was true. Just seeking confirmation.

All Replies (4)

jscher2000 - Support Volunteer
jscher2000 - Support Volunteer
  • Top 10 Contributor
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Hmmm, I knew about a Firefox preference to disable link prefetching (Network.prefetch-next @ MozillaZine Knowledge Base). But I didn't know about the preferences related to DNS prefetching (Network.dns.disablePrefetch and, per Controlling DNS prefetching, network.dns.disablePrefetchFromHTTPS).

The Firefox 13 "all changes" page listing fixed bugs (buglist.html) shows one change to how DNS requests are handled, intended to apply to users using a proxy autoconfiguration (PAC) file. Maybe there is a connection there?

winders
winders Question owner
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No PAC file.. The change also happened when I updated Win7 64-bit system to FF13. One unique thing about my systems is that I am IPv6 dual stack, but I doubt that is the cause. It might be that one of the bugfixes accidentally eliminated the disable behavior.

winders
winders Question owner
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Problem does not seem to exist on Mac. Just a Windows thing. Hmm...

winders
winders Question owner
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Confirming the broken behavior is still present on Win7 x64 with Firefox 14.0.1.

Modified by winders