this post was submitted on 20 Sep 2023
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Privacy
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Privacy has become a very important issue in modern society, with companies and governments constantly abusing their power, more and more people are waking up to the importance of digital privacy.
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Some of the items on that list are kinda weird. Why would I want to block a website from knowing my screen size?
Window sizes can vary widely and if you come from the same IP with the same exact window size (1033x832 for example) then people wanting to track you for ads etc will have a higher degree of confidence that you're the same person. It's part of "browser fingerprinting", which can also include things like the extensions you have installed: https://amiunique.org/
Tracking/advertising corporations have developed techniques called 'browser fingerprinting' where innocuous seeming things like screen size and the fonts you ahve installed on your system can be used to uniquely identify you and track you across the internet even without cookies or anything like that.
It's one of the metrics used to build unique identifiers (amongst many many others).