JonDoFox user agent

With release version 2.8.0. of JonDoFox we changed the definition of the anonymity group of JonDonym users. A Firefox 24 (Linux, i686) is now used to fake the user agent of JonDoFox browser. Mozilla/5.0 (X11; Linux i686; rv:24.0) Gecko/20100101 Firefox/24.0

Reasons for the change are:

  • Because of analysis of publications of real world browser fingerprinting some old assumptions were corrected.

  • We don't want to use a fake of a Windows browser any more. It is a little bit obscurity (not security).

The new fake is only full plausible if you were using a Firefox 24esr. Firefox 17esr and Firefox 24esr have small differences in Javascript values, which may be used for browser fingerprinting. Javascript is blocked by default in JonDoFox, but time by time it will be enabled. We recommend an update to Firefox 24esr for all JonDoFox users.

Full set user agent fake parameters for do-it-by-self men:

general.useragent.overrideMozilla/5.0 (X11; Linux i686; rv:24.0) Gecko/20100101 Firefox/24.0
general.appversion.override5.0 (X11)
general.oscpu.overrideLinux i686
general.platform.overrideLinux i686

Release of JonDoBrowser 0.11 beta (based on Firefox 24.1.0) is sheduled for Monday. The new live-cd will follow 2 days later.


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