533340 - Frequent "Server not found" errors (errors don't occur using Internet Explorer)

Status: RESOLVED DUPLICATE of bug 475603

(Firefox :: General, defect)

Description

[hatch]

User-Agent:       Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.9.0.15) Gecko/2009101601 Firefox/3.0.15 (.NET CLR 3.5.30729)
Build Identifier: Firefox 3.5

For the past few weeks I got frequent "Server not found" errors using Firefox 3.5.  These errors did not occur with Internet Explorer.  After trying many things suggested on the internet, I finally downgraded to FF 3.0 and the problem has gone away.

Reproducible: Sometimes




Can you let me know when this gets fixed, so I can upgrade to FF 3.5 again?  ([e-mail])

Comment 1

[Frank Wein [:mcsmurf]]

Are you using a personal firewall?

Comment 2

[hatch]

Yes, I use a McAfee firewall.  But I tried turning it off and the problem did not go away.  

Before I switched back to FF 3.0, I was using FF 3.5.5 which is dated early November, 2009.  Since the problem first started to occur in early November, it might be associated specifically with version 3.5.5.

I use a NetGear router.

Comment 3

[Tim (fmdeveloper)]

Can you try Bug 533216 comment 2?

<quote>
Please open about:config, confirm the warning, right click on the list and
select NEW, Boolean, for preference name use "network.dns.disablePrefetch"
(without the "") and the Value is "true".
Restart Firefox - is it now better ?
</quote>

Comment 4

[Matthias Versen [:Matti]]

an additional question:  which router are you using ?

Comment 5

[hatch]

(In reply to comment #4)
> an additional question:  which router are you using ?

I use a Netgear router.

Comment 6

[hatch]

(In reply to comment #1)
> Are you using a personal firewall?

Yes, I use a McAfee firewall.  But I disabled the firewall and the problem did not go away.

Comment 7

[hatch]

(In reply to comment #3)
> Can you try Bug 533216 comment 2?
> 
> <quote>
> Please open about:config, confirm the warning, right click on the list and
> select NEW, Boolean, for preference name use "network.dns.disablePrefetch"
> (without the "") and the Value is "true".
> Restart Firefox - is it now better ?
> </quote>

I believe I tried this when the problem was occurring (but I'm not positive), and it did not help.  At this point I am happily running FF 3.0, and since I already spent a lot of time investigating the Server not Found problem I would prefer to just keep on using FF 3.0 (which works fine).  I'm sorry but I don't have time to re-install FF 3.5.5 and do more experiments right now.