Protecting identity - blocking System Fonts info

[OZO]

OK, then. Let's keep v.10.12.06 as a working copy.

With regards to Henrik Gemal and his method at http://browserspy.dk/fonts-flash.php - it actually uses the same code to get list of system fonts (obj.GetVariable("/:user_fonts")). It's here:

Code:

$(document).oneTime(4000, function() {
  if (!fontsok) {
    var fonts = false;
    var obj = document.getElementById("fontshelper");
    if (typeof(obj.GetVariable) != "undefined") {
      fonts = obj.GetVariable("/:user_fonts");
    }
    fontList(fonts);
  }
});

So, this filter could help here too.

I agree with your summary about what we try to do here. Of cause it's not 100% reliable and the cat/mouse rule applies... But it's better to do what we can then, then do nothing. And I'm sure you think the same way too.

Regarding to "Altering or blocking javascripts may allow sites to target machines for tracking (or other unwanted behaviour)." I'd say - they're welcome to do so! Let them detect and the more they discover that current user base using protective measures, the more they may start to think if those tracking techniques are cost effective... These days many folks around just block JavaScript visiting unknown sites (I'm not among them, but I see clear the tendency now). So, blocking JavaScripts is not something unique that comes only from Proxo users. Again the more they discover such things - the better...

Thank you for the hint how to edit log files on a fly. I appreciate that and the great help with making the filter

BTW, my list of System Fonts contains 123 items! How more unique it could be?! It's like an GUID created on my side... Now it's all gone!!!