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My experiences with Pi-hole
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this post was submitted on 18 Apr 2024
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Privacy
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Sorry, I don't understand this point.
The way I understand it is that the user looks for icons of services it knows, but not the exact icon but just something similar. The thing I don't understand is why is this a problem, but probably I misunderstood something.
I see. I think caching could be solved in a way that does not reintroduce that tracking possibility, though.
One approach would be to only have that cache be used by the new tab page. Page visits always update it, but not read it.
Another would be to always use the cache, but never tell the server that we have that icon cached. The former is probably better though.
In hindsight probably I have misread something. Sorry for the tension.
The first example I gave is a Classico way that a person would examine favicons to determine the software serving the website. If I wanted to do this to your website I’d resolve a bunch of your sites pages and look for a favicon that’s the default of like nginx or something then when I find it I know what I’m up against.
There’s not really a way to do caching that defeats the second example. The whole point of caching is to avoid sending a bunch of data back and forth, so even if you don’t let a website touch and grab all over the objects in the cache and instead only treat the page’s content as a manifest then the website will still be able to figure out what favicons corresponding to dates and times you’ve got in there by seeing weather or not the browser asks for them to be sent.
I guess you could just not say anything to the web server, let it send whatever it wants and ignore it, but at that point you’d be better off to do the default behavior of just not caching favicons instead and skip a step.
But the idea is that the website can't tell that, because websites would use a different cache store than the new tab page.
Even if facebook's icon is saved in the new tab page's cache, when a website wants to load that icon it will only try to find it in the normal cache. If it's not there or it is expired, it is requested again, passed to the normal cache store, and the normal cache store can also give that to the cache store if the new tab page.