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Re: [perpass] HTTP user-agent fingerprinting

From: Mark Nottingham <mnot@mnot.net>
Date: Tue, 17 Sep 2013 10:56:09 +1000
Cc: Patrick Pelletier <code@funwithsoftware.org>, "William Chan (陈智昌)" <willchan@chromium.org>, Stephen Farrell <stephen.farrell@cs.tcd.ie>, HTTP Working Group <ietf-http-wg@w3.org>
Message-Id: <02E2999A-FE78-4AE9-BF04-B09A8F27F05D@mnot.net>
To: Karl Dubost <karl@la-grange.net>

This has been discussed ad nauseum in the communities it affects; folks really need to read the links below as well as the related browser bugs before discussing here.

See also:
  http://trac.tools.ietf.org/wg/httpbis/trac/ticket/232

Cheers,


On 14/09/2013, at 7:43 AM, Karl Dubost <karl@la-grange.net> wrote:

> Patrick,
> 
> As William Chan (陈智昌) [2013-09-13T17:22] said:
>> Changing the UA string breaks web compat, and when the end user's favorite site foo.com fails to render in browser X, the end user switches to browser Y.
> 
> 
> I guess I could write yet another article to explain the 1001 ways a Web site breaks because of UA strings. :) but in the mean time background reading
> 
> https://hacks.mozilla.org/2013/09/user-agent-detection-history-and-checklist/
> https://wiki.mozilla.org/Compatibility/Mobile
> https://wiki.mozilla.org/Compatibility/Mobile/WipeOutUAOverides
> http://my.opera.com/community/openweb/
> http://www.opera.com/docs/browserjs/
> 
> You can help fix some of these, it's a required experience for understanding the insanity going on around ;)
> https://bugzilla.mozilla.org/describecomponents.cgi?product=Tech%20Evangelism
> 
> That's my job for the last 3 years. First at Opera, then now at Mozilla. :)
> 
> 
> -- 
> Karl Dubost
> http://www.la-grange.net/karl/
> 

--
Mark Nottingham   http://www.mnot.net/
Received on Tuesday, 17 September 2013 00:56:40 UTC

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